CN109950377A - Light-emitting diode chip for backlight unit, light emitting device and electronic device - Google Patents
Light-emitting diode chip for backlight unit, light emitting device and electronic device Download PDFInfo
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- CN109950377A CN109950377A CN201910222406.7A CN201910222406A CN109950377A CN 109950377 A CN109950377 A CN 109950377A CN 201910222406 A CN201910222406 A CN 201910222406A CN 109950377 A CN109950377 A CN 109950377A
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- light
- emitting diode
- diode chip
- backlight unit
- substrate
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L33/36—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the electrodes
- H01L33/38—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the electrodes with a particular shape
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L33/48—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L33/02—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor bodies
- H01L33/20—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor bodies with a particular shape, e.g. curved or truncated substrate
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L33/44—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the coatings, e.g. passivation layer or anti-reflective coating
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- H01L2224/73—Means for bonding being of different types provided for in two or more of groups H01L2224/10, H01L2224/18, H01L2224/26, H01L2224/34, H01L2224/42, H01L2224/50, H01L2224/63, H01L2224/71
- H01L2224/732—Location after the connecting process
- H01L2224/73201—Location after the connecting process on the same surface
- H01L2224/73203—Bump and layer connectors
- H01L2224/73204—Bump and layer connectors the bump connector being embedded into the layer connector
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L33/02—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor bodies
- H01L33/20—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor bodies with a particular shape, e.g. curved or truncated substrate
- H01L33/22—Roughened surfaces, e.g. at the interface between epitaxial layers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L33/44—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the coatings, e.g. passivation layer or anti-reflective coating
- H01L33/46—Reflective coating, e.g. dielectric Bragg reflector
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L33/48—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
- H01L33/483—Containers
- H01L33/486—Containers adapted for surface mounting
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L33/48—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
- H01L33/50—Wavelength conversion elements
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L33/48—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
- H01L33/62—Arrangements for conducting electric current to or from the semiconductor body, e.g. lead-frames, wire-bonds or solder balls
Landscapes
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Manufacturing & Machinery (AREA)
- Computer Hardware Design (AREA)
- Power Engineering (AREA)
- Led Devices (AREA)
- Led Device Packages (AREA)
Abstract
The present invention provides a kind of light-emitting diode chip for backlight unit, light emitting device and electronic device.Light-emitting diode chip for backlight unit includes: substrate；Luminescent structural, on substrate, including the first conductive type semiconductor layer, the second conductive type semiconductor layer on the first conductive type semiconductor layer and the active layer between the first conductive type semiconductor layer and the second conductive type semiconductor layer, and at least one hole for exposing a part of the first conductive type semiconductor layer including perforation the second conductive type semiconductor layer and active layer；Electrode is contacted, is at least partially inside on the second conductive type semiconductor layer；Reflective insulating layer covers the side and upper surface of luminescent structural；First pad electrode is located on reflective insulating layer, is electrically connected by the first opening portion with the first conductive type semiconductor layer；And second pad electrode, it is located on reflective insulating layer, is electrically connected by the second opening portion with contact electrode.
Description
The present invention be proposed on October 14th, 2016 application No. is 201610900247.8, entitled " shine
Diode chip for backlight unit " application for a patent for invention divisional application.
Technical field
The present invention relates to a kind of small light-emitting diode chip, light emitting device and electronic devices.
Background technique
Light emitting diode is used in large-scale back light unit (Back Light Unit:BLU), general lighting and electric component etc.
In various products, and it is widely used in small household appliances product and decorative product.
Light emitting diode is also used for conveying information, shows the various uses such as aesthetic feeling in addition to being used simply as light source.Cause
This, it is desirable that utilize the design freedom of the product of light emitting diode.For example, need to be in flexible printed circuit (Flexible
Printed Circuits Board:FPCB) installation light emitting diode and freely change the form of product.Especially, it is desirable that can
The product for needing freely to change form according to demand.
However, light emitting diode is for example made by gallium nitrate kind single crystal semiconductor, so light emitting diode can not be changed
Form.But if small light-emitting diode is installed to flexible printed circuit etc., it is more free that deformation can be made
Product.Therefore, in order to manufacture deformable product, it is desirable that the miniaturization of light emitting diode.
On the other hand, most light emitting diode is usually installed to lead using solder.It shines being installed using solder
In the case where diode, light emitting diode is prone to crooked (tilting) due to the mobility of solder.In order to solve this ask
Topic can form the skew of slot and light emitting diode caused by preventing from because of solder in lead.However, it is very difficult to flexibility
Lead on the substrates such as FPCB carries out forming the processing such as slot, in the case where lead forms slot, when changing the form of product, draws
Line is prone to break and lead to the problem of the reliability decrease of product.Moreover, configuring small-sized shine with relatively narrow interval
In the case where diode, slot is formed in the more part of lead, therefore reliability more declines.
It is therefore desirable to which it is higher to develop a kind of not only manufacture yield, but also it can ensure that design freedom, ensure to be suitable for various set
The durability of meter, light-emitting diode chip for backlight unit and light emitting device suitable for preventing skew.
Summary of the invention
[the invention project to be solved]
The present invention project to be solved is to provide a kind of by area and minimizing thickness, and luminous efficiency is higher and makes
Make the higher light-emitting diode chip for backlight unit of yield.
The present invention another project to be solved is that electric short circuit can not only be prevented by providing one kind, but also can reduce made
The flip chip type light-emitting diode chip for backlight unit of the electrical property deviation for the chip chamber made.
The present invention another project to be solved is to provide a kind of joint portion by using minimal thickness will be through
The light-emitting diode chip for backlight unit of miniaturization and slimming is installed to the light emitting device on substrate and realizing slimming, and provides a kind of resistance to
The excellent light emitting device of long property.
The present invention another project to be solved is that providing one kind not only can ensure that the durability of product, but also is being pacified
The light-emitting diode chip for backlight unit and light emitting device of skew can be also prevented when dress.
The present invention another project to be solved is that providing a kind of includes the light-emitting diodes tube core for being minimized and being thinned
The application product of piece and/or light emitting device.
[means to solve the problem]
The light-emitting diode chip for backlight unit of one embodiment of the invention includes: substrate, multiple protrusions including being formed in upper surface
Portion；Luminescent structural, be located at the substrate on, including the first conductive type semiconductor layer, be located at the first conductive type semiconductor
The second conductive type semiconductor layer on layer and between the first conductive type semiconductor layer and the second conductive type semiconductor layer
Active layer, and make the first conductive type semiconductor including penetrating through the second conductive type semiconductor layer and the active layer
At least one hole that a part of layer is exposed；Electrode is contacted, is at least partially inside on the second conductive type semiconductor layer, is wrapped
Include the transparent conductive oxide with the second conductive type semiconductor layer Ohmic contact；Reflective insulating layer covers the hair
The side and upper surface of light tectosome, including the first opening for exposing the first conductive type semiconductor layer exposed by the hole
Portion and the second opening portion for exposing the contact electrode locally, and including distributed Bragg reflector；First weld pad electricity
Pole is located on the reflective insulating layer, is electrically connected by first opening portion with the first conductive type semiconductor layer；
And second pad electrode, it is located on the reflective insulating layer, is electrically connected by second opening portion and the contact electrode
It connects；And a part of the upper surface of the substrate is exposed to the periphery of the luminescent structural, the reflective insulating layer and dew
Connect out in the upper surface of the substrate on the periphery of the luminescent structural, the top corner angle and the reflective of the substrate insulate
Layer separates.
The light emitting device of another embodiment of the invention includes: the second substrate；Light-emitting diode chip for backlight unit is located at described the
On two substrates；And first joint portion and the second joint portion, between the light-emitting diode chip for backlight unit and the second substrate；Institute
Stating light-emitting diode chip for backlight unit includes: first substrate, the multiple protruding portion including being formed in lower surface；Luminescent structural is located at institute
The lower section for stating first substrate is led including the second conductive type semiconductor layer, first on the second conductive type semiconductor layer
Electric type semiconductor layer and the active layer between the first conductive type semiconductor layer and the second conductive type semiconductor layer, and
Make a part of the first conductive type semiconductor layer including the perforation the second conductive type semiconductor layer and the active layer
At least one hole exposed；Electrode is contacted, the lower section of the second conductive type semiconductor layer is at least partially inside, with described the
Two conductive semiconductor layer Ohmic contact；Reflective insulating layer, covers the side and lower surface of the luminescent structural, including makes
The first opening portion and expose the contact electrode locally that the first conductive type semiconductor layer exposed by the hole exposes
The second opening portion, and including distributed Bragg reflector；First pad electrode, positioned at the lower section of the reflective insulating layer,
It is electrically connected by first opening portion with the first conductive type semiconductor layer；And second pad electrode, it is located at described anti-
The lower section of photosensitiveness insulating layer is electrically connected by second opening portion with the contact electrode；And under the first substrate
The a part on surface is exposed to the periphery of the luminescent structural, and the reflective insulating layer and exposing are in the luminescent structural
The lower surface of first substrate on periphery connect, the lower part corner angle of the first substrate are separated with the reflective insulating layer, institute
It states the first joint portion and second joint portion and is electrically connected respectively to first pad electrode and the second pad electrode.
According to still another embodiment of the invention, a kind of light-emitting diode chip for backlight unit is provided comprising: substrate；The first conductive type
Semiconductor layer, configuration is on the substrate；Table top is configured on the first conductive type semiconductor layer, including active layer and
Two conductive semiconductor layer；Insulating layer covers the first conductive type semiconductor layer and the table top, including makes described first to lead
At least one first opening portion that electric type semiconductor layer is exposed and the second opening portion positioned at the top of the table top；First weldering
Electrode is padded, the top of the insulating layer is configured to, the first conductive type is electrically connected to by first opening portion and is partly led
Body layer；And second pad electrode, it is configured to the top of the insulating layer, is electrically connected to described by second opening portion
Two conductive semiconductor layer；And the first opening portion of the insulating layer includes the firstth area covered by first pad electrode
Domain and be exposed to first pad electrode outside the secondth area
In one embodiment, the insulating layer includes multiple first opening portions, and two in first opening portion
It is arranged respectively at the two sides of the table top.
In one embodiment, one side of the configuration in the two sides of the table top in first opening portion.
In one embodiment, the table top includes multiple grooves from side-facing depressions, multiple first opening portion difference
Expose the first conductive type semiconductor layer exposed in multiple grooves locally.
In one embodiment, the table top further includes the through hole for exposing the first conductive type semiconductor layer, described
Insulating layer further includes the opening portion for exposing the first conductive type semiconductor layer in the through hole, the first weld pad electricity
Pole is electrically connected to the first conductive type semiconductor layer by the through hole.
In one embodiment, through hole configuration is between the groove, the arrangements of grooves in the table top two
Side.
In one embodiment, the second area of first opening portion makes the side office of the first conductive type semiconductor layer
Expose to portion.
In one embodiment, light-emitting diode chip for backlight unit further includes contact electrode, the contact electrode configuration to the table top
It is contacted between the insulating layer with the second conductive type semiconductor layer, second pad electrode is connected to the contact
Electrode.
In one embodiment, it is projected by the substrate to outside in the light that the active layer generates, and by described
It is projected to outside in region between first pad electrode and second pad electrode.
In one embodiment, the contact electrode is the light transmissive transparent electrode for making to generate in the active layer.
According to still another embodiment of the invention, a kind of light emitting device is provided comprising: substrate；Conductive wires, configuration exist
In the substrate；The light-emitting diode chip for backlight unit, configuration is on the substrate；And first engagement material and second engagement material, make institute
It states light-emitting diode chip for backlight unit and is joined to the conductive wires.
[invention effect]
According to the present invention, a kind of light-emitting diode chip for backlight unit of simple structure is provided, thus can provide through miniaturization and it is slim
The efficient LED chip and light emitting device of change.Also, by making the second area of the first opening portion be exposed to the first weldering
The outside for padding electrode can reduce the electrical property variation between light-emitting diode chip for backlight unit, manufacturing process be stabilized, therefore hair can be improved
The manufacture yield of luminous diode chip.In turn, even if not processed to the lead on substrate, prevented also from light-emitting diodes tube core
The skew of piece, therefore the durability of product can be improved, multiple chips can be equably installed in product.
By detailed description later, it is clearly understood that other features and advantages of the present invention.
Detailed description of the invention
Fig. 1 to Fig. 3 is the top view and sectional view to illustrate the light-emitting diode chip for backlight unit of one embodiment of the invention.
Fig. 4 is the sectional view to illustrate the light emitting device of another embodiment of the present invention.
Fig. 5 a to Figure 10 b is bowing to the manufacturing method that illustrates the light-emitting diode chip for backlight unit of another embodiment of the present invention
View and sectional view.
Figure 11 to Figure 13 is the top view to illustrate the light-emitting diode chip for backlight unit 100 of one embodiment of the invention.
Figure 14 and Figure 15 is the sectional view to illustrate the light-emitting diode chip for backlight unit 100 of one embodiment of the invention.
Figure 16 is the top view to the current path for illustrating the light-emitting diode chip for backlight unit 100 of the embodiment of the present invention.
Figure 17 to Figure 21 b be top view to illustrate the light-emitting diode chip for backlight unit 200 of another embodiment of the present invention and
Sectional view.
Figure 22 to Figure 26 is top view to illustrate the light-emitting diode chip for backlight unit 300 of another embodiment of the present invention and cuts open
Face figure.
Figure 27 to Figure 31 is top view to illustrate the light-emitting diode chip for backlight unit 400 of another embodiment of the present invention and cuts open
Face figure.
Figure 32 a to Figure 37 b is the manufacturing method to illustrate the light-emitting diode chip for backlight unit 100 of one embodiment of the invention
Top view and sectional view.
Figure 38 is the light-emitting diode chip for backlight unit 100 with wavelength conversion section to illustrate another embodiment of the present invention
Summary section.
Figure 39 is the light-emitting diode chip for backlight unit 100 with wavelength conversion section to illustrate another embodiment of the present invention
Summary section.
Figure 40 is the approximate stereogram for indicating the light-emitting diode chip for backlight unit of Figure 39.
Figure 41 is the summary section to illustrate the light emitting device of one embodiment of the invention.
Figure 42 is the summary section to illustrate the light emitting device of another embodiment of the present invention.
Figure 43 (a) and Figure 43 (b) is the application to illustrate the light-emitting diode chip for backlight unit using one embodiment of the invention
The partial perspective view of product.
Figure 44 is the skeleton diagram to illustrate the lamp bar of one embodiment of the invention.
Figure 45 is to illustrate the light emitting diode of one embodiment of the invention (Light Emitting Diode, LED)
The summary section of lamp.
Figure 46 (a) to Figure 48 be to illustrate the electronic device of another embodiment of the present invention perspective view, top view, cut open
Face figure and circuit diagram.
Figure 49 is the top view to illustrate the flexible keyboard of another embodiment of the present invention.
Figure 50 is the partial cutaway view of Figure 49.
Specific embodiment
Hereinafter, being illustrated in detail to the embodiment of the present invention referring to attached drawing.The embodiment introduced later is to fill
The reality divided ground to convey thought of the invention to general technical staff of the technical field of the invention and provided in exemplary fashion
Apply example.Therefore, the present invention is not limited to embodiments described below, can also be embodied in other forms.In addition, facilitating
See, width, length, thickness of constituent element etc. can also be turgidly indicated in figure.Also, it is being recorded as at a constituent element
In the case where " top " of other constituent elements or "upper", not only include each section be in other parts " upper part " or
The case where " surface ", but also the feelings including being interposed another constituent element between each component and other constituent elements
Condition.Throughout the manual, identical reference marks indicates identical constituent element.
Hereinafter, introducing light-emitting diode chip for backlight unit, light emitting device and various application products.Herein, light-emitting diode chip for backlight unit is half
Ordinary meaning used in conductor process, it is intended that the bare die (die) separated by singulation process from chip.Also, it can be
Before singulation or after singulation, wavelength conversion section is provided to the light-emitting diode chip for backlight unit.There is provided wavelength conversion section to hair
Device made of on luminous diode chip can be named as light-emitting diode chip for backlight unit, light emitting device can also be named as, in this specification
In, it is classified as light-emitting diode chip for backlight unit.On the other hand, " light emitting device ", which refers to, is installed to secondary substrate for light-emitting diode chip for backlight unit
Or device made of substrate.As long as being equipped with the device of light-emitting diode chip for backlight unit in substrate, then any device, example can be named as
Such as light emitting device is named as including specific application product.In the detailed description, single light emitting diode will be mainly installed
The device of chip is known as light emitting device, but light emitting device is not necessarily construed to this narrow sense, later illustrated lamp paper, lamp bar
And keyboard can also be named as light emitting device.
The light-emitting diode chip for backlight unit of one embodiment of the invention includes: substrate, multiple protrusions including being formed in upper surface
Portion；Luminescent structural, be located at the substrate on, including the first conductive type semiconductor layer, be located at the first conductive type semiconductor
The second conductive type semiconductor layer on layer and between the first conductive type semiconductor layer and the second conductive type semiconductor layer
Active layer, and make the first conductive type semiconductor including penetrating through the second conductive type semiconductor layer and the active layer
At least one hole that a part of layer is exposed；Electrode is contacted, is at least partially inside on the second conductive type semiconductor layer, is wrapped
Include the transparent conductive oxide with the second conductive type semiconductor layer Ohmic contact；Reflective insulating layer covers the hair
The side and upper surface of light tectosome, including the first opening for exposing the first conductive type semiconductor layer exposed by the hole
Portion and the second opening portion for exposing the contact electrode locally, and including distributed Bragg reflector；First weld pad electricity
Pole is located on the reflective insulating layer, is electrically connected by first opening portion with the first conductive type semiconductor layer；
And second pad electrode, it is located on the reflective insulating layer, is electrically connected by second opening portion and the contact electrode
It connects；And a part of the upper surface of the substrate is exposed to the periphery of the luminescent structural, the reflective insulating layer and dew
Connect out in the upper surface of the substrate on the periphery of the luminescent structural, the top corner angle and the reflective of the substrate insulate
Layer separates.
The thickness of the light-emitting diode chip for backlight unit can be 40 μm or more and 90 μm or less.
The horizontal sectional area of the light-emitting diode chip for backlight unit can be 30000 μm2Above and 65000 μm2Below.
The current density of the driving current of the light-emitting diode chip for backlight unit can be 7mA/mm2Above and 250mA/mm2Below.
The area of first pad electrode and second pad electrode and can be the light-emitting diode chip for backlight unit
80% or more and 95% or less of horizontal area.
First pad electrode and the most short of the second pad electrode can be 3 μm to 20 μm separated by a distance.
The a part exposed in the protruding portion of the upper surface of the substrate can be covered by the reflective insulating layer.
The remaining a part exposed in the protruding portion of the upper surface of the substrate can be exposed.
The contact electrode can cover the upper surface of the second conductive type semiconductor layer, including make the luminescent structural
Hole expose third opening portion and expose the second conductive type semiconductor layer locally at least one the 4th opening
Portion.
The width of 4th opening portion be less than second opening portion width, it is described contact electrode upper surface one
Part can connect with second pad electrode.
The substrate may include patterned sapphire substrate.
First pad electrode may include to be formed its upper surface and it is corresponding with the position of first opening portion depending on
Position recess portion, second pad electrode may include to be formed its upper surface and it is corresponding with the position of second opening portion depending on
The recess portion of position.
The light emitting device of one embodiment of the invention includes: the second substrate；Light-emitting diode chip for backlight unit is located at second base
On plate；And first joint portion and the second joint portion, between the light-emitting diode chip for backlight unit and the second substrate；The hair
Luminous diode chip includes: first substrate, the multiple protruding portion including being formed in lower surface；Luminescent structural is located at described the
The lower section of one substrate, including the second conductive type semiconductor layer, the first conductive type on the second conductive type semiconductor layer
Semiconductor layer and the active layer between the first conductive type semiconductor layer and the second conductive type semiconductor layer, and including
It penetrates through the second conductive type semiconductor layer and the active layer and exposes a part of the first conductive type semiconductor layer
At least one hole；Electrode is contacted, the lower section of the second conductive type semiconductor layer is at least partially inside, is led with described second
Electric type semiconductor layer Ohmic contact；Reflective insulating layer, covers the side and lower surface of the luminescent structural, including makes to pass through
The first opening portion that the first conductive type semiconductor layer that the hole is exposed exposes and make that the contact electrode locally exposes the
Two opening portions, and including distributed Bragg reflector；First pad electrode passes through positioned at the lower section of the reflective insulating layer
First opening portion and be electrically connected with the first conductive type semiconductor layer；And second pad electrode, it is located at the reflective
The lower section of insulating layer is electrically connected by the second opening portion with the contact electrode；And the one of the lower surface of the first substrate
Part is exposed to the periphery of the luminescent structural, and the reflective insulating layer and exposing are on the periphery of the luminescent structural
The lower surface of first substrate connects, and the lower part corner angle of the first substrate are separated with the reflective insulating layer, and described first connects
Conjunction portion and second joint portion are electrically connected respectively to first pad electrode and the second pad electrode.
Most short between first joint portion and the second joint portion can be greater than first pad electrode and the separated by a distance
Between two pad electrodes it is most short separated by a distance.
At least one of first joint portion and the second joint portion can at least partially cover reflective insulating layer, institute
State the side that reflective insulating layer covers the luminescent structural.
At least one of first joint portion and the second joint portion can at least partially cover exposing and shine described
The lower surface of the first substrate on the periphery of tectosome.
At least one of first joint portion and the second joint portion can locally cover the side of the first substrate.
First joint portion and the second joint portion may include solder.
In the electronic device including input unit of the embodiments of the present invention, the electronic device includes embodiment
Light-emitting diode chip for backlight unit and light emitting device at least any one.
The input unit may include multiple keypads, and the multiple keypad may include being formed thereon shining for surface
Region, the light projected from the light emitting region can be the light projected from the light-emitting diode chip for backlight unit or the light emitting device.
The input unit may include multiple keypads, and the multiple keypad includes the luminous zone for being formed thereon surface
Domain, the light-emitting diode chip for backlight unit can be located at at least part of lower section in the multiple keypad, can be shone by described
Project the light projected from the light-emitting diode chip for backlight unit or the light emitting device in region.
The light-emitting diode chip for backlight unit of another embodiment of the present invention includes: substrate；The first conductive type semiconductor layer, configuration exist
On the substrate；Table top is configured on the first conductive type semiconductor layer, including active layer and the second conductive type semiconductor
Layer；Insulating layer covers the first conductive type semiconductor layer and the table top, including reveals the first conductive type semiconductor layer
At least one first opening portion out and the second opening portion positioned at the top of the table top；First pad electrode is configured to institute
The top for stating insulating layer is electrically connected to the first conductive type semiconductor layer by first opening portion；And second weld pad
Electrode is configured to the top of the insulating layer, is electrically connected to the second conductive type semiconductor by second opening portion
Layer；And the first opening portion of the insulating layer includes the first area by first pad electrode covering and is exposed to described
The second area of the outside of first pad electrode.
By additional second area, the first opening portion can be relatively largely formed, therefore can will be in limited design
The process that the first opening portion is formed in range stabilizes.Small-sized light-emitting diode chip for backlight unit can be easily provided as a result,.Moreover,
Second area is located at the outside of the first pad electrode, therefore will not change to the contact area of the first pad electrode and have an impact.
Therefore, even if the size of the first opening portion changes due to the tolerance in manufacturing process, the first pad electrode can also be mitigated
Thus the variation of contact area can reduce the deviation of the electrical properties such as the forward voltage between light-emitting diode chip for backlight unit.
On the other hand, the insulating layer may include multiple first opening portions, and two in first opening portion can distinguish
It is configured to the two sides of the table top.In turn, one in first opening portion is configured into the side of the table top
One side between the two sides.By configuring first opening portion in the side of table top, it can prevent the area of table top from subtracting
It is few, electric current can be uniformly dispersed in table top.
The table top may include multiple grooves from side-facing depressions, and multiple first opening portions can make to expose respectively described more
The first conductive type semiconductor layer in a groove locally exposes.
In some embodiments, the table top further includes the through hole for exposing the first conductive type semiconductor layer, institute
Stating insulating layer may additionally include the opening portion for exposing the first conductive type semiconductor layer in the through hole.First weldering
Pad electrode can be electrically connected to the first conductive type semiconductor layer by the through hole.By forming through hole in table top,
It can help to the scattered current in table top.
The through hole is configured into configuration between the groove of the two sides of the table top.But the present invention and unlimited
Due to this, the position of through hole is also changed.
On the other hand, the second area of first opening portion can make the side part of the first conductive type semiconductor layer
Expose on ground.Therefore, the first opening portion can be larger formed relatively.
The light-emitting diode chip for backlight unit, which may also include, to be configured between the table top and the insulating layer and with described second
The contact electrode of conductive-type semiconductor layer contact, second pad electrode may be connected to the contact electrode.
The contact electrode may include third opening portion, and the third opening portion can be located in second opening portion.Cause
This, a part of the contact electrode is exposed to second opening portion, and the second pad electrode can be in second opening portion
It is connected to the contact electrode and the second conductive type semiconductor layer.
In some embodiments, the contact electrode can be the light transmissive transparent electrode for making to generate in the active layer.
In turn, it can be projected by the substrate to outside in the light that the active layer generates, and pass through first pad electrode
Region between the second pad electrode and projected to outside.Thus, it is possible to provide the light emitting diode of light is projected to both direction
Chip.
On the other hand, the light-emitting diode chip for backlight unit may also include configuration prolonging on the first conductive type semiconductor layer
Electrode is stretched, the first opening portion of the insulating layer exposes the extending electrode locally, and first pad electrode can pass through
First opening portion is connected to the extending electrode.
In some embodiments, the light-emitting diode chip for backlight unit may also include the wavelength convert of configuration on the substrate
Portion.In turn, the wavelength conversion section can cover the upper surface and side of the substrate.
The light emitting device of another embodiment of the present invention includes: substrate；Conductive wires, configuration is on the substrate；Institute
Light-emitting diode chip for backlight unit is stated, configuration is on the substrate；And first engagement material and second engagement material, make the light-emitting diodes tube core
Chip bonding is to the conductive wires；And the first engagement material and the second engagement material make the light-emitting diode chip for backlight unit respectively
First pad electrode and the second pad electrode are joined to the conductive wires.
The first engagement material can be contacted with exposing in the first conductive type semiconductor layer of the second area.Even if first
Engagement material is contacted with the first conductive type semiconductor layer, will not lead to the problem of electric short circuit.In turn, the first engagement material can be with the
One conductive-type semiconductor layer Schottky contacts, so even the first engagement material is contacted with the first conductive type semiconductor layer, it will not
Change forward voltage.
On the other hand, first pad electrode and the second weld pad can be greater than separated by a distance between the conductive wires
Between electrode separated by a distance.
In turn, the first engagement material and the second engagement material can locally cover the side of the conductive wires.
On the other hand, the substrate can be flexible substrate, and then can be transparent membrane.The substrate can be in various shapes
Shape, such as can be in the paper shape or longer belt shape with wider area.The light emitting device can provide as lamp as a result,
Paper, lamp bar (strap orband) or keyboard etc..
On the other hand, according to an embodiment of the invention, providing a kind of various applications using the light-emitting diode chip for backlight unit
Product.
Hereinafter, being illustrated referring to attached drawing to various embodiments of the present invention.
Fig. 1 to Fig. 3 is the top view and sectional view to illustrate the light-emitting diode chip for backlight unit 50 of one embodiment of the invention.
Specifically, Fig. 1 is the top view for indicating the plane of the light-emitting diode chip for backlight unit 50, Fig. 2 is for ease of description, to omit the
One pad electrode 151, the second pad electrode 153 and reflective insulating layer 140 and indicate table top 120m and contact the flat of electrode 130
The top view in face.Fig. 3 is the sectional view for indicating the section of part corresponding with the A-A' line of Fig. 1 and Fig. 2.
Referring to figs. 1 to Fig. 3, light-emitting diode chip for backlight unit 50 includes substrate 110, luminescent structural 120, contacts electrode 130, is anti-
Photosensitiveness insulating layer 140, the first pad electrode 151 and the second pad electrode 153.
Light-emitting diode chip for backlight unit 50 can be the small light-emitting diode chip with lesser horizontal area.Light emitting diode
Chip 50 can have about 65000 μm2Horizontal sectional area below, and then can have about 30000 μm2Above and about 65000 μm2With
Under horizontal sectional area.For example, light-emitting diode chip for backlight unit 50 can have the size of 200 μm of 180 μm of 230 μ m or 250 μ ms.So
And the horizontally long and lengthwise of the light-emitting diode chip for backlight unit 50 of embodiment is not limited to above content.Also, light-emitting diode chip for backlight unit
50 can be the small light-emitting diode chip with relatively thin thickness.Light-emitting diode chip for backlight unit 50 can have about 90 μm of thickness below
T1 is spent, and then there can be about 40 μm or more and 90 μm of thickness T1 below.It can be with 7mA/mm2Above and 250mA/mm2It is below
Current density drives light-emitting diode chip for backlight unit 50.The light-emitting diode chip for backlight unit 50 of the present embodiment has above-mentioned horizontal sectional area and thickness
Degree, therefore the light-emitting diode chip for backlight unit 50 can be easily applicable to require small-sized and/or thin light-emitting device various electronics
Device.
Substrate 110 can be insulative substrate or conductive board.Substrate 110 can be for grow luminescent structural 120
Growth substrate, it may include sapphire substrate, silicon carbide substrate, silicon substrate, gallium nitride base board, aluminium nitride substrate etc..Also, base
Plate 110 includes the multiple protruding portion 110p for being formed thereon at least part region on surface.The multiple protruding portion of substrate 110
110p is formed as rule and/or irregular pattern.For example, substrate 110 may include patterned sapphire substrate
(Patterned sapphire substrate:PSS), the patterned sapphire substrate includes being formed in upper surface
Multiple protruding portion 110p.
In turn, substrate 110 may include in from the horizontally extending belt shape of at least one side of substrate 110 at least
One modified region 111.Modified region 111 can be in separating base plate 110 and by element singulation during is formed.For example, can
Modified region is formed by carrying out internal processing to substrate 110 using internal process approach (for example, stealthy cutting equipment)
111.Delineation face can be formed in the inside of substrate 110 by the internal processing laser.At this point, from modified region 111 to substrate
The distance of 110 bottom surfaces is smaller than the distance from modified region 111 to the upper side of substrate 110.Considering to light-emitting diodes
When the light of the side outgoing of tube chip 50, it is intended to which the lower side of substrate 110 is laser machined and is relatively prone to lower part shape
At the modified region 111, the light that is formed in luminescent structural 120 thus can be improved to external extraction efficiency.Also, if
Form modified region 111 in a manner of close to luminescent structural 120, then can in laser machining process nitride-based semiconductor by
Damage and electrical property is led to the problem of.Therefore, forming modified region 111 in a manner of the lower section side positioning for tending to substrate 110,
It can prevent 50 reliability decrease of light-emitting diode chip for backlight unit caused by being damaged because of luminescent structural 120 and luminous efficiency decline.
Luminescent structural 120 is located on substrate 110.Also, the area of the lower surface of luminescent structural 120 is smaller than substrate
Thus the area of 110 upper surface can expose the upper table of substrate 110 at least part region on 120 periphery of luminescent structural
Face.A part of multiple protruding portion 110p can between luminescent structural 120 and substrate 110, the one of multiple protruding portion 110p
Part can be exposed to the periphery of luminescent structural 120.
The upper surface of substrate 110 is exposed to the periphery of luminescent structural 120, and thus light-emitting diode chip for backlight unit 50 was manufacturing
Bending (bowing) in journey is reduced, and is thus prevented luminescent structural 120 impaired and is improved manufacture yield.Also, because described
Bending reduce and the stress for being applied to luminescent structural 120 can be reduced, therefore can more unfertile land processing substrate 110 thickness.As a result,
It can provide the light-emitting diode chip for backlight unit 50 through being thinned with about 90 μm of lower thickness below.The embodiment that will be stated below
In content related to this is illustrated in more detail.
Luminescent structural 120 includes the first conductive type semiconductor layer 121, on the first conductive type semiconductor layer 121
The second conductive type semiconductor layer 125 and between the first conductive type semiconductor layer 121 and the second conductive type semiconductor layer 125
Active layer 123.The first conductive type semiconductor layer 121, active layer 123 and the second conductive type semiconductor layer 125 may include III-V
Nitride-based semiconductor, such as may include the nitride-based semiconductor such as (Al, Ga, In) N.The first conductive type semiconductor layer 121
May include p-type impurity (for example, Si, Ge, Sn), the second conductive type semiconductor layer 125 may include n-type impurity (for example, Mg, Sr,
Ba).Also, it can also be opposite with above content.Active layer 123 may include multiple quantum wells construction (MQW), be adjusted nitride-based half
The ratio of components of conductor, to project desired wavelength.In particular, in the present embodiment, the second conductive type semiconductor layer 125 can be
P-type semiconductor layer.
Luminescent structural 120 may include at least partially penetrating through active layer 123 and the second conductive type semiconductor layer 125 and revealing
At least one hole 120h of the first conductive type semiconductor layer 121 out.Hole 120h reveals the first conductive type semiconductor layer 121 locally
Out, the side of hole 120h can be surrounded by active layer 123 and the second conductive type semiconductor layer 125.Also, luminescent structural 120 can
Including table top 120m, the table top includes active layer 123 and the second conductive type semiconductor layer 125.Table top 120m, which is located at first, to be led
In electric type semiconductor layer 121.Hole 120h can be formed in a manner of penetrating through table top 120m, and thus hole 120h is formed as by table top
The form that 120m is surrounded.However, as long as the light-emitting diode chip for backlight unit 50 of the present embodiment exposes the first conductive type in through hole 120h
The construction of semiconductor layer 121 can also omit table top 120m then without limitation.
Contact electrode 130 is located on the second conductive type semiconductor layer 125.Contact electrode 130 can partly be led with the second conductive type
125 Ohmic contact of body layer.Contacting electrode 130 may include transparent electrode.Transparent electrode for example may also include such as tin indium oxide
(Indium Tin Oxide, ITO), zinc oxide (Zinc Oxide, ZnO), zinc indium tin oxide (Zinc Indium Tin
Oxide, ZITO), indium zinc oxide (Zinc Indium Oxide, ZIO), zinc-tin oxide (Zinc Tin Oxide, ZTO), oxidation
Gallium indium tin (Gallium Indium Tin Oxide, GITO), indium gallium (Gallium Indium Oxide, GIO), oxidation
Zinc gallium (Gallium Zinc Oxide, GZO), aluminium-doped zinc oxide (Aluminum doped Zinc Oxide, AZO), fluorine are mixed
The transparent conductive oxide of miscellaneous tin oxide (Fluorine Tin Oxide, FTO) etc. and the translucency metal of such as Ni/Au
At least one of layer.The electroconductive oxide may also include various dopants.
In particular, including that the contact electrode 130 of transparent conductive oxide and ohm of the second conductive type semiconductor layer 125 connect
It is higher to touch efficiency.That is, the electroconductive oxide of such as ITO or ZnO and the contact resistance of the second conductive type semiconductor layer 125 are lower than
The contact resistance of metallic electrode and the second conductive type semiconductor layer 125, therefore include connecing for electroconductive oxide by application
Touched electrode 130 can reduce the forward voltage (V of light-emitting diode chip for backlight unit 50f) and improve luminous efficiency.In particular, as this implementation
In the case where the same small light-emitting diode chip driven with lower current density of the light-emitting diode chip for backlight unit 50 of example, reduce
It contacts the contact resistance of electrode 130 and the second conductive type semiconductor layer 125 and improves Ohm characteristic, so as to more effectively improve
Luminous efficiency.Also, compared with metallic electrode, electroconductive oxide removes (peeling) from nitride-based semiconductor layer
Probability is lower, therefore has the light-emitting diode chip for backlight unit 50 of the contact electrode 130 including electroconductive oxide is with higher can
By property.On the other hand, the current dissipation efficiency of the horizontal direction of electroconductive oxide is relatively lower than metallic electrode, but this implementation
The light-emitting diode chip for backlight unit 50 of example has about 65000 μm2Horizontal sectional area below, therefore because the decline of current dissipation efficiency causes
Luminous efficiency decline it is very small or hardly decline.Therefore, by will include that the contact electrode 130 of electroconductive oxide is answered
Light-emitting diode chip for backlight unit 50 is used, electrical property can be improved, improves luminous efficiency.
There is no restriction for the thickness of contact electrode 130, but can have aboutExtremelyThickness.E.g., including ITO
Contact electrode 130 be formed as aboutThickness.It, can since contact electrode 130 has the thickness of above range
Disperse electric current successfully in the horizontal direction and improves the electrical property of light-emitting diode chip for backlight unit 50.
Also, contacting electrode 130 includes the first opening portion 130a for exposing at least one hole 120h.First opening portion
The side of 130a can be formed far from least one hole 120h in a manner of surrounding at least one hole 120h.At this point, the first opening
The size on top of the size of portion 130a greater than hole 120h.Electrode 130 is contacted substantially to cover the second conductive type semiconductor layer 125
The mode of upper surface entirety formed, thus when driving light-emitting diode chip for backlight unit 50, current dissipation efficiency can be improved.In turn,
Contact electrode 130 may also include at least one the second opening portion 130b for exposing the second conductive type semiconductor layer 125 locally.
Second pad electrode 153 described below is formed in a manner of at least partially filling the second opening portion 130b, thus can be increased
The contact area of second pad electrode 153.The second pad electrode 153 can be effectively prevented as a result, from contact electrode 130 or shine
Tectosome 120 is removed.Content related to this is illustrated in more detail later.
Reflective insulating layer 140 covers the upper surface and side of luminescent structural 120, and covers contact electrode 130.And
And reflective insulating layer 140 can be to extend to the side exposed in the upper surface of the substrate 110 on the periphery of luminescent structural 120
Formula is formed.Reflective insulating layer 140 can connect with the upper surface of substrate 110 as a result, therefore can more stably configure covering and shine
The reflective insulating layer 140 of the side of tectosome 120.However, reflective insulating layer 140 is not formed as extending to substrate 110
The upper surface on the periphery of the top corner angle of substrate 110 is exposed in top faceted portions.Also, reflective insulating layer 140 may include making
Expose at least one hole 120h the third opening portion 140a that locally exposes of the first conductive type semiconductor layer 121 and make to connect
The 4th opening portion 140b that touched electrode 130 is locally exposed.
The third opening portion 140a of reflective insulating layer 140 makes to expose partly to be led in the first conductive type of at least one hole 120h
Body layer 121 locally exposes.At this point, covering the side of hole 120h by reflective insulating layer 140 and preventing electric short circuit.Third is opened
Oral area 140a can be used as allowing the access of the first conductive type semiconductor layer 121 with the first pad electrode 151 being electrically connected.Reflective
4th opening portion 140b of insulating layer 140 exposes contact electrode 130 locally.4th opening portion 140b can be used as allowing to contact
The access of electrode 130 and the second pad electrode 153 being electrically connected.On the other hand, in some embodiments, the 4th opening portion 140b
It is corresponding and position with the contact position of the second opening portion 130b of electrode 130.At this point, the size of the 4th opening portion 140b is greater than the
Thus the size of two opening portion 130b locally exposes the upper surface of contact electrode 130 in the 4th opening portion 140b.
Reflective insulating layer 140 may include distributed Bragg reflector.The distributed Bragg reflector can be with refraction
The mode of the different dielectric layer of rate lamination repeatedly is formed, such as the dielectric layer may include TiO2、SiO2、HfO2、ZrO2、
Nb2O5、MgF2Deng.In some embodiments, reflective insulating layer 140 can be in the TiO of alternately lamination2Layer/SiO2Layer construction.Point
Each layer of cloth Bragg reflector can have 1/4 optical thickness of specific wavelength, be formed as 4 pairs to 20 to (pairs).Instead
The topmost layer of photosensitiveness insulating layer 140 can be by SiNxIt is formed.By SiNxThe moisture resistance of the layer of formation is excellent, can protect light-emitting diodes
Influence of the tube chip from moisture.
In the case where reflective insulating layer 140 includes distributed Bragg reflector, the lowest part of reflective insulating layer 140
Layer can play the effect of the bottom or boundary layer for the film quality that distributed Bragg reflector can be improved.As shown in the enlarged drawing of Fig. 3, instead
Photosensitiveness insulating layer 140 may include the boundary layer 141 with relatively thick thickness and refractive index on boundary layer 141 not
The lamination construction 143 of same dielectric layer.For example, reflective insulating layer 140 may include about 0.2 μm to 1.0 μ m thicks by
SiO2The boundary layer 141 of formation and on boundary layer 141 according to specific period lamination TiO repeatedly2Layer/SiO2Lamination made of layer
Construction 143.
The distributed Bragg reflector can visible reflectance with higher.The distributed Bragg reflector can
Design as follows: incidence angle is 0~60 °, has 90% or more reflectivity to the light that wavelength is 400~700nm.It can lead to
It crosses and type, thickness, the lamination period of multiple dielectric layers etc. that form distributed Bragg reflector is controlled and tool is provided
There is the distributed Bragg reflector of above-mentioned reflectivity.It can be formed as a result, to the light of opposite long wavelength (for example, 550nm to 700nm)
And the light of opposite short wavelength is (for example, distributed Bragg reflector of the 400nm to 550nm) reflectivity with higher.
As described above, the distributed Bragg reflector may include multiple lamination construction, so as to distributed Bragg reflector
To the light of wider wave band reflectivity with higher.That is, the distributed Bragg reflector may include having first thickness
Second lamination structure made of the construction of first lamination made of dielectric layer lamination and the dielectric layer lamination with second thickness
It makes.For example, the distributed Bragg reflector may include with the light for being less than the central wavelength (about 550nm) relative to visible light
First lamination made of dielectric layer lamination for the thickness of 1/4 optical thickness constructs and has and is thicker than relative to visible light
Central wavelength (about 550nm) light be 1/4 optical thickness thickness dielectric layer lamination made of the second lamination construct.
In turn, the distributed Bragg reflector may also include third lamination construction, and the third lamination construction is that have to be thicker than relatively
In the light of the central wavelength (about 550nm) of visible light be 1/4 optical thickness thickness dielectric layer, with have be thinner than it is opposite
Lamination forms the dielectric layer of thickness of optical thickness for being 1/4 in the light repeatedly.
Reflective insulating layer 140 can locally cover the part that the upper surface of substrate 110 is exposed.At this point, reflective insulate
The protruding portion 110p for the part that the upper surface that layer 140 can locally cover substrate 110 is exposed.It is reflective as shown in the enlarged drawing of Fig. 3
Property insulating layer 140 can cover a part of the protruding portion 110p of exposing.Cover the reflective insulating layer of the upper surface of substrate 110
140 surface can have to be distributed with the substantially similar surface in the surface of substrate 110.Reflective insulating layer 140 is to cover substrate 110
The mode of the protruding portion 110p exposed formed, thus can reflect improved because of the light of the protruding portion 110p of exposing scattering it is luminous
The luminous efficiency of diode chip for backlight unit 50.
In the distribution Bradley of the reflective insulating layer 140 for the upper surface and side entirety for almost covering luminescent structural 120
Thus the luminous efficiency of the light-emitting diode chip for backlight unit 50 can be improved in lattice reflector reflected light.In particular, transmission includes that hair can be improved
The light of the contact electrode 130 of the electroconductive oxide of the electrical property of luminous diode chip 50 can be reflected in reflective insulating layer 140
And it is projected to the lower part of substrate 110.Also, the shape in a manner of covering to the side of luminescent structural 120 of reflective insulating layer 140
At, therefore also reflect in reflective insulating layer 140 towards the light of the side of luminescent structural 120 and penetrated to the lower part of substrate 110
Out.Also, the upper surface of the substrate 110 on 120 periphery of luminescent structural is exposed, thus reflective insulating layer 140 and substrate 110
Upper surface connects and more stably covers the side of luminescent structural 120, so as to pass through the side of luminescent structural 120
The light of loss minimizes.
On the other hand, in the case where reflective insulating layer 140 connects with the upper surface of substrate 110, the top of substrate 110
Also expose the upper surface on corner angle periphery.That is, the top corner angle of substrate 110 are separated with reflective insulating layer 140.Dividing as a result,
Chip and during forming multiple light-emitting diode chip for backlight unit 50, prevent in the cutting procedure of substrate 110 (for example, passing through inside
The substrate 110 that processing cutting, delineation and/or fracture carry out is divided) in because reflective insulating layer 140 caused by laser etc. damage
(for example, removing, rupture etc.).In particular, in the case where reflective insulating layer 140 includes distributed Bragg reflector, if instead
Photosensitiveness insulating layer 140 is impaired, then light reflectivity can decline.According to the present embodiment, can prevent because of this reflective insulating layer 140
The decline of luminous efficiency caused by damaging.Content related to this will be illustrated in more detail in the embodiment stated below.
First pad electrode 151 and the second pad electrode 153 are located on reflective insulating layer 140.First pad electrode 151
It can pass through by third opening portion 140a and 121 Ohmic contact of the first conductive type semiconductor layer, the second pad electrode 153
Four opening portion 140b and with contact electrode 130 be electrically connected.In the case where contacting electrode 130 includes the second opening portion 130b, the
Two pad electrodes 153 can be contacted with the second conductive type semiconductor layer 125.However, in the case, the second pad electrode 153 with
Contact resistance between the second conductive type semiconductor layer 125 is higher than the second pad electrode 153 and contacts the contact electricity between electrode 130
Resistance, thus it is higher by the probability that the current direction that the second pad electrode 153 is connected contacts electrode 130.For example, the second weld pad is electric
Pole 153 and the second conductive type semiconductor layer 125 can form Schottky contacts.It therefore, can will be because of the second pad electrode 153 and
Current concentrated (current crowding) minimum of the contact of two conductive semiconductor layer 125 and generation.
First pad electrode 151 and the second pad electrode 153 can have respectively and be formed first pad electrode 151 and
The surface of the bottom surfaces of the part of second pad electrode 153 is distributed corresponding upper surface distribution.First pad electrode 151 as a result,
It may include the recess portion 151a on the 140a of third opening portion, the second pad electrode 153 may include being located at the 4th opening portion 140b
On recess portion 153a.As described above, being formed in the lower part of the first pad electrode 151 and the second pad electrode 153 has scale
Surface generates rank in the part of contact so that the contact area of the first pad electrode 151 and the second pad electrode 153 will increase
Difference and prevent the first pad electrode 151 and the second pad electrode 153 from removing.In particular, including the second opening portion in contact electrode 130
In the case where 130b, the second pad electrode 153 forms the recess portion 153a with rib portion, can more efficiently prevent from the second pad electrode
153 removings.
On the other hand, it can relatively very ninor feature be separated at the first pad electrode 151 and the most short of the second pad electrode 153
Distance D1 may be, for example, about 3 μm to about 20 μm.The reflective insulation of the side of covering luminescent structural 120 can be stably formed
Layer 140, so illustrated in the embodiment as follows that will be stated, it can be in a manner of covering to the side of light-emitting diode chip for backlight unit 50
Form the joint portion 211,213 that the engagement of light-emitting diode chip for backlight unit 50 is arrived to the second substrate 1000.As a result, without ensuring by the first weldering
The process range of the most short D1 separated by a distance generation of electrode 151 and the second pad electrode 153 is padded, therefore can be by the first pad electrode
151 and second the most short D1 separated by a distance of pad electrode 153 be reduced to minimum limit.Also, with the driving of lower current density
The small light-emitting diode chip 50 of the present embodiment, therefore can more reduce the first pad electrode 151 and the second pad electrode 153
Most it is short separated by a distance.By the way that the most short D1 separated by a distance of the first pad electrode 151 and the second pad electrode 153 is formed as above-mentioned
The radiating efficiency of light-emitting diode chip for backlight unit 50 can be improved in range.At this point, the area of the first pad electrode 151 and the second weld pad electricity
The sum of area of pole 153 can be about 80% or more and 95% or more of the horizontal sectional area of light-emitting diode chip for backlight unit 50.
Fig. 4 is the sectional view to illustrate the light emitting device of another embodiment of the present invention.
Referring to Fig. 4, the light emitting device includes the second substrate 1000, the light-emitting diodes tube core in the second substrate 1000
Piece 50, the first joint portion 211 and the second joint portion 213.
The second substrate 1000 can provide the region of installation light-emitting diode chip for backlight unit 50, may be, for example, LED encapsulation body
Substrate or the substrate of light emitting module etc..The second substrate 1000 may include substrate 310 and the first electric conductivity in substrate 310
Pattern 321 and the second conductive pattern 323.The second substrate 1000 may include conductive board, insulative substrate or printed circuit
Plate (PCB).For example, as shown, the second substrate 1000 can include: insulating properties substrate 310；And first conductive pattern 321 and
Second conductive pattern 323 is located in substrate 310, electrically isolated from one.For example, the first conductive pattern 321 and the second electric conductivity
Pattern 323 can be separated from each other according to D3 separated by a distance and is electrically insulated.At this point, the first conductive pattern 321 and the second electric conductivity figure
Case 323 can be electrically connected respectively to the first pad electrode 151 and the second pad electrode 153 of light-emitting diode chip for backlight unit 50.However, this
It's not limited to that for invention, as long as the second substrate 1000 has following construction, no limitation: provides installation light-emitting diode chip for backlight unit
50 region can be electrically connected with light-emitting diode chip for backlight unit 50.
Light-emitting diode chip for backlight unit 50 is located in the second substrate 1000, is electrically connected with the second substrate 1000.Light-emitting diodes tube core
Piece 50 can be the light-emitting diode chip for backlight unit 50 referring to figs. 1 to Fig. 3 each embodiment being illustrated.
First joint portion 211 and the second joint portion 213 between light-emitting diode chip for backlight unit 50 and the second substrate 1000 and
The second substrate 1000 is arrived into the engagement of light-emitting diode chip for backlight unit 50, and is electrically connected to each other.It first joint portion 211 can be with light-emitting diodes
First pad electrode 151 of tube chip 50 contacts, and contacts with the first conductive pattern 321 of the second substrate 1000.With this phase
Seemingly, the second joint portion 213 can be contacted with the second pad electrode 153 of light-emitting diode chip for backlight unit 50, and with the second substrate 1000
The contact of second conductive pattern 323.As long as the first joint portion 211 and the second joint portion 213 be by light-emitting diode chip for backlight unit 50 with
The substance that the second substrate 1000 is electrically connected and is engaged with each other, then without limitation, such as may include solder.
Also, at least one of the first joint portion 211 and the second joint portion 213 can be with the sides of light-emitting diode chip for backlight unit 50
At least part in face contacts.In one embodiment, at least one of the first joint portion 211 and the second joint portion 213 can be covered
At least part of the side for the reflective insulating layer 140 that lid covers the side of luminescent structural 120, and then exposing can be covered
At least part in the lower surface of the substrate 110 on the periphery of luminescent structural 120, and then can also cover the side of substrate 110
At least part.
As described above, at least one of the first joint portion 211 and the second joint portion 213 with light-emitting diode chip for backlight unit 50
The mode of at least part contact of side formed, thus most short between the first joint portion 211 and the second joint portion 213 separates
Distance D2 can be less than the most short D1 separated by a distance between the first pad electrode 151 and the second pad electrode 153.Therefore, even if it is smaller
Ground forms most short D1 separated by a distance (for example, about 3 μm to 20 μm), can also shorter D1 separated by a distance larger form most short separate
Distance D2, therefore when installing light-emitting diode chip for backlight unit 50, electric short circuit can be prevented.In particular, light-emitting diode chip for backlight unit 50
Reflective insulating layer 140 steadily cover the side of luminescent structural 120, so even the first joint portion 211 and/or second
Joint portion 213 is contacted with the side of light-emitting diode chip for backlight unit 50, will not generate electrical problems.In particular, reflective insulating layer 140
Formed in a manner of the upper surface exposed for extending to substrate 110, thus can more stably insulated luminous tectosome 120 side
Face, to prevent the electric short circuit occurred by joint portion 211,213 and the side of luminescent structural 120.Also, joint portion 211,
213 areas contacted with light-emitting diode chip for backlight unit 50 increase and can more stably install light-emitting diode chip for backlight unit 50, so as to mention
The mechanical stability of high light emitting device.In turn, joint portion 211,213 can be reduced and be interposed light-emitting diode chip for backlight unit 50 and the second base
Thickness (that is, between light-emitting diode chip for backlight unit 50 and the second substrate 1000 separated by a distance) between plate 1000, therefore can will send out
Electro-optical device smallerization and slimming.
Fig. 5 a to Figure 10 b is the manufacturing method to illustrate the light-emitting diode chip for backlight unit 50 of another embodiment of the present invention
Top view and sectional view.
The detailed description for constituting substantially the same composition omitted and illustrated in the above-described embodiments.Also, below
By in the figure for the embodiment stated, the method for indicating two light-emitting diode chip for backlight unit 50 of manufacture, but the present invention is not limited to this.?
The case where manufacturing single light-emitting diode chip for backlight unit 50 and three or more multiple light emitting diodes are formed on the chip of large area
It, can also be using the manufacturing method of the light-emitting diode chip for backlight unit 50 of embodiment described below in the case where chip 50.In the various figures,
Line L1 is defined as the boundary line of unit element region UD1.That is, the luminescent structural 120 of two sides is separated on the basis of line L1, from
And two light-emitting diode chip for backlight unit 50 can be manufactured.Also, each sectional view indicates corresponding with the B-B' line in corresponding top view
Partial section.For example, indicating the section of part corresponding with the B-B' line of Fig. 5 a in figure 5b.
Referring to Fig. 5 a and Fig. 5 b, luminescent structural 120 is formed on substrate 110.Luminescent structural 120 is usually using
The various methods growth known, such as using Metalorganic chemical vapor deposition (Metal Organic Chemical Vapor
Deposition, MOCVD), molecular beam epitaxy (Molecular Beam Epitaxy, MBE) or hydrite vapor phase epitaxy
Technology growths such as (Hydride Vapor Phase Epitaxy, HVPE).
Secondly, forming at least one hole 120h and contact electrode 130 in luminescent structural 120 referring to Fig. 6 a to Fig. 7 b.Into
And it locally removes luminescent structural 120 and forms the isolation channel 120i for exposing the upper surface of substrate 110.
Specifically, forming contact electrode 130 on luminescent structural 120 with reference first to Fig. 6 a and Fig. 6 b.
Contact electrode 130 can be formed on the second conductive type semiconductor layer 125 of luminescent structural 120 and with the second conduction
Type semiconductor layer 125 forms Ohmic contact.Contacting electrode 130 may include transparent conductive oxide and/or translucency metal.Example
Such as, forming contact electrode 130 may include using such as sputter and/or the evaporation coating method being electromagnetically deposited in the second conductive type semiconductor
ITO is formed on layer 125.However, forming contact electrode 130 may include other to form such as ZnO the present invention is not limited to this
Various transparent conductive oxides can apply various manufacturing processes according to the type of electroconductive oxide.
Then, referring to Fig. 7 a and Fig. 7 b, luminescent structural 120 is patterned and forms perforation the second conductive type semiconductor layer
125 and active layer 123 at least one hole 120h.In turn, luminescent structural 120 is patterned and forms perforation the second conductive type
Semiconductor layer 125, active layer 123 and the first conductive type semiconductor layer 121 and the isolation channel for exposing the upper surface of substrate 110
120i.Such as luminescent structural 120 is patterned using dry-etching and/or wet etching process.
Luminescent structural 120 is divided into multiple luminous on constituent parts element area UD1 by isolation channel 120i
Tectosome 120.Therefore, isolation channel 120i can be formed by L1 along the line.As described above, form isolation channel 120i and by luminescent structural
120 are divided into multiple luminescent structurals 120 on multiple unit element region UD1, thus can mitigate because of substrate 110 and hair
The stress that coefficient of thermal expansion differences between light tectosome 120 generates.The generation when manufacturing light-emitting diode chip for backlight unit 50 can be reduced as a result,
Chip bending (bowing).
Contact electrode 130 can be patterned, may include being formed to reveal at least one hole 120h by the contact patterning of electrode 130
The first opening portion 130a out.In turn, the contact patterning of electrode 130 may also include to be formed and makes the second conductive type semiconductor layer
125 the second opening portion 130b locally exposed.Such as electrode will be contacted using dry-etching and/or wet etching process
130 patternings.
In the above-described embodiments, illustrate to be initially formed after contact electrode 130 and patterning luminescent structural 120, but this
It's not limited to that for invention.In embodiments, after can also first patterning luminescent structural 120, in the second conductive type half
Contact electrode 130 is formed in conductor layer 125.
Then, referring to Fig. 8 a and Fig. 8 b, reflective insulating layer 140 is formed, the reflective insulating layer covers light-emitting structure
The upper surface and side of body 120, including third opening portion 140a and the 4th opening portion 140b.
Forming reflective insulating layer 140 may include being distributed Bradley made of lamination with forming the different metaboly of refractive index
Lattice reflector.For example, forming reflective insulating layer 140 may include alternately being accumulated repeatedly using the well known evaporation coating method such as sputter
Layer SiO2Layer and TiO2Layer.Also, formed reflective insulating layer 140 may include to be formed covering luminescent structural 120 upper surface,
The distributed Bragg reflector is patterned and forms third opening by the distributed Bragg reflector of side and isolation channel 120i
Portion 140a and the 4th opening portion 140b, and expose the upper surface of the substrate 110 of isolation channel 120i.Therefore, a unit is covered
The reflective insulating layer 140 of the luminescent structural 120 of the element area UD1 another unit element region UD1's adjacent with covering
The reflective insulating layer 140 of luminescent structural 120 is separated from each other.
Secondly, the first pad electrode 151 and the second weldering can be formed on reflective insulating layer 140 referring to Fig. 9 a and Fig. 9 b
Pad electrode 153.
First pad electrode 151 can pass through the third opening portion 140a and the first conductive type half of reflective insulating layer 140
Conductor layer 121 contacts, and can Ohmic contact.Similarly, the second pad electrode 153 can pass through the of reflective insulating layer 140
Four opening portion 140b and with contact electrode 130 contact and be electrically connected.First pad electrode 151 and the second pad electrode 153 can be by
The same process is formed together, for example, optical lithography or removing can be utilized after being formed by vapor deposition and/or plating process
(lift off) technology and pattern.
Then, 0a and Figure 10 b referring to Fig.1 can reduce the thickness of substrate 110 by removing a part of 110a of substrate 110
Degree.The thickness of multiple unit element region UD1 can be thinning at thickness T1 as a result,.Hereafter, L1 divides substrate 110 along the line, thus may be used
Multiple light-emitting diode chip for backlight unit 50 as shown in Figure 1 to Figure 3 are provided.
A part of 110a for removing substrate 110 may include locally removing substrate 110 by physically and/or chemically method.
For example, locally removing substrate 110 using the methods of grinding, grinding.If reducing the thickness of substrate 110, because hot swollen
Swollen coefficient difference and in the state of wafer bending support chip substrate 110 it is thinning, thus stress increase.Therefore, it is applied to luminous
The stress of tectosome 120 increase and luminescent structural 120 a possibility that generating damage it is higher.But according to the present embodiment, subtracting
Before the thickness of small substrate 110, the isolation channel 120i that luminescent structural 120 is divided into multiple luminescent structurals 120 is formed, thus
The damage that bending can be mitigated, stress is mitigated and prevent luminescent structural 120 caused by reducing because of the thickness of substrate 110.In particular,
Stress more reduces due to size relatively small unit element region UD1 for meeting, therefore the thickness of constituent parts element area UD1 can subtract
Small is about 90 μm of thickness below.
It may include by delineation and breaking step of breaking separating base plate 110 that L1, which divides substrate 110, along the line.At this point, scoring procedure can
Internal processing is carried out to substrate 110 including the use of inside processing laser (for example, invisible laser).At this point, utilizing internal processing
In the case where laser, it can be formed in at least one side of substrate 110 and be changed at least one of horizontally extending belt shape
Matter region 111.
According to the present embodiment, L1 forms isolation channel 120i along the line, and reflective insulating layer 140 is to expose the side of isolation channel 120i
Formula is separated from each other.As a result, reflective insulating layer 140 will not be affected during dividing substrate 110 because of laser etc. or
It is impaired, therefore the damage of the reflective insulating layer 140 generated by reflective insulating layer 140 can be prevented (for example, removing, rupture
Deng).In particular, reflective insulating layer 140 include distributed Bragg reflector in the case where, if reflective insulating layer 140 by
Damage, then light reflectivity can decline.According to the manufacturing method of the present embodiment, the damage because of this reflective insulating layer 140 can be prevented
And the luminous efficiency decline of manufactured light-emitting diode chip for backlight unit 50.
The light-emitting diode chip for backlight unit 50 and light emitting device of above-described embodiment include substrate 110 upper surface expose part and
Reduce the wafer bending of light-emitting diode chip for backlight unit 50 in the fabrication process.The degree of wafer bending is smaller as a result, therefore can be as upper
The thickness that content equally reduces substrate 110 is stated, the manufacture yield of light-emitting diode chip for backlight unit 50 can be improved.Therefore it provides a kind of reality
Now miniaturization and slimming and the higher light-emitting diode chip for backlight unit 50 of reliability and light emitting device.Also, reflective insulating layer 140
To cover the side of luminescent structural 120 and more cover to the upper surface of substrate 110 exposed, the protrusion of especially substrate 110
The mode of portion 110p extends to form, and the luminous efficiency of light-emitting diode chip for backlight unit 50 thus can be improved.Also, joint portion 211,213
Can be covered by this reflective insulating layer 140 to the side of light-emitting diode chip for backlight unit 50, thus light emitting device can realize it is small
The mechanical stability of light emitting device can be improved in type.
As described above, the mechanical stability and luminous efficiency of the light emitting device of embodiment it is excellent and realize miniaturization and it is slim
Change, therefore portable electronic device can be advantageously applied to.It as an example, can be by the light emitting device or light-emitting diode chip for backlight unit
50 are applied to the paper of relatively thin thickness are required to write plate (paper writing board).As another example, by the luminous dress
It sets in the case where being applied to the input unit such as keyboard, the lower section of the keypad of the light emitting device can be located at and send out keypad
Light.In this input unit, keypad receives external stress (for example, pressurization to be inputted) repeatedly.Also, just
Take the relatively thin thickness of formula input unit requirement and lesser size.The light emitting device of embodiment realizes miniaturization and slimming, because
This is suitable for slim portable input device, and mechanical stability is excellent and light emitting device is because the movement of keyboard is (for example, be applied to
The pressure of keypad) that undesirable probability occurs is very small.
Figure 11 to Figure 13 is the top view to illustrate the light-emitting diode chip for backlight unit of one embodiment of the invention, it is specific and
Speech, Figure 11 indicate the plane of light-emitting diode chip for backlight unit 100, and Figure 12 is to omit light-emitting diode chip for backlight unit 100 for ease of description
The first pad electrode 151 and the second pad electrode 153 top view, Figure 13 is to omit light emitting diode for ease of description
The top view of first pad electrode 151 of chip 100, the second pad electrode 153 and reflective insulating layer 140.Figure 14 and Figure 15
It is the sectional view to illustrate the light-emitting diode chip for backlight unit of one embodiment of the invention, specifically, Figure 14 is indicated with Figure 11 extremely
The section of the corresponding part of A-A' line of Figure 13, Figure 15 indicate the section of part corresponding with the B-B' line of Figure 11 to Figure 13.Figure
16 be the top view to the current path for illustrating the light-emitting diode chip for backlight unit of the embodiment of the present invention.In order to avoid repeating to say
It is bright, the explanation of the composition similar or substantially the same to the composition illustrated in above-described embodiment can be omitted in the following description.
Referring to Fig.1 1 to Figure 15, the light-emitting diode chip for backlight unit 100 of embodiment includes substrate 110, luminescent structural 120, anti-
Photosensitiveness insulating layer 140, the first pad electrode 151 and the second pad electrode 153.Also, light-emitting diode chip for backlight unit 100 may also include
Contact electrode 130.
Light-emitting diode chip for backlight unit 100 can be the small light-emitting diode chip with lesser horizontal area.Light-emitting diodes
Tube chip 100 can have about 70000 μm2Horizontal sectional area below, and then can have about 30000 μm2Above and about 70000 μm2
Horizontal sectional area below.For example, light-emitting diode chip for backlight unit 100 can have the ruler of 200 μm of 180 μm of 310 μ m or 330 μ ms
It is very little.However, the horizontally long and lengthwise of the light-emitting diode chip for backlight unit 100 of embodiment is not limited to above content.Also, light-emitting diodes
Tube chip 100 can be the small light-emitting diode chip with relatively thin thickness.Light-emitting diode chip for backlight unit 100 can have about 90 μm
Thickness T1 below, and then can have about 40 μm or more and 90 μm of thickness T1 below, such as can have about 80 μm of thickness T1.
The light-emitting diode chip for backlight unit 100 of the present embodiment has above-mentioned horizontal sectional area and thickness, therefore can be by the light-emitting diodes tube core
Piece 100 is easily applicable to require the various electronic devices of small-sized and/or slim light emitting device.Further, it is possible to 5mA/mm2
Above and 400mA/mm2Current density below drives light-emitting diode chip for backlight unit 100.Due to being shone with the driving of this current density
Diode chip for backlight unit 100, therefore the light-emitting diode chip for backlight unit 100 is applicable to require through small-sized and slimming light emitting diode
The application apparatus of chip or light emitting device.
Substrate 110 can be insulative substrate or conductive board.Substrate 110 can be for grow luminescent structural 120
Growth substrate, it may include sapphire substrate, silicon carbide substrate, silicon substrate, gallium nitride base board, aluminium nitride substrate etc..Also, base
Plate 110 may include the multiple protruding portion 110p for being formed thereon at least part region on surface.
In turn, substrate 110 may include in from the horizontally extending belt shape of at least one side of substrate 110 at least
One modified region 111.Modified region 111 can be dividing substrate 110 and by element singulation during is formed.For example,
It, can be in substrate 110 after dividing substrate and carrying out internal processing to the substrate 110 before singulation using internal process approach
Side forms modified region 111.As internal process approach, internal processing laser, i.e. stealthy (stealth) laser can be used.
Delineation face can be formed in the inside of substrate 110 by the internal processing laser, substrate 110 can be divided along delineation face.Another party
Face indicates modified region 111, but this expression in the sectional view of Figure 14 and Figure 15 as being formed in the inside of substrate 110
Mode is that for ease of description, modified region 111 can form at least one side to substrate 110 as above content.
At this point, the distance T2 from modified region 111 to the upper side of substrate 110 is smaller than from modified region 111 to substrate
The distance T4 of 110 bottom surfaces.Also, the thickness T3 of modified region 111 can be greater than distance T4.For example, distance T2 can be about 30 μ
M to 35 μm, thickness T3 can be about 15 μm to 20 μm, and distance T4 can be about 20 μm to 25 μm.
In the light for considering to be emitted to the side of light-emitting diode chip for backlight unit 100, it is intended to which the lower side of substrate 110 is swashed
Light process and be relatively prone to lower part and form the modified region 111, thus can be improved luminescent structural 120 formed light to
External extraction efficiency.
On the other hand, nitride-based partly to lead if forming modified region 111 in a manner of close to luminescent structural 120
Know from experience and is damaged in laser machining process and electrical property is led to the problem of.In particular, executing what the inside using laser processing processed
Semiconductor portion in about 40 μm away from the nitride-based semiconductor situations below in part, positioned at the top for executing the internal part processed
Branch is impaired.On the contrary, can will shine before dividing substrate 110 in the case where light-emitting diode chip for backlight unit 100 of the present embodiment
120 singulation of tectosome (isolation) and expose the upper surface of substrate 110, the substrate 110 upper surface expose
Partial lower section executes internal processing.Therefore, it can prevent nitride-based semiconductor in the inside processing using laser, send out
Light tectosome 120 is impaired.The distance T2 from modified region 111 to the upper side of substrate 110 can be formed smaller as a result, as above
Described, distance T2 can have the thickness of about 30 μm to 35 μm of range.As described above, distance T2 can be reduced, therefore can be with substrate
110 upper side closer forms modified region 111, therefore can more reduce the thickness of substrate 110, so as to by light emitting diode
Chip 100 is more thinned.
Luminescent structural 120 is located on substrate 110.Also, the area of the lower surface of luminescent structural 120 is smaller than substrate
Thus the area of 110 upper surface can expose the upper table of substrate 110 at least part region on 120 periphery of luminescent structural
Face.The region exposed on 120 periphery of luminescent structural is known as separating the region (Isolation).The upper surface of substrate 110 it is more
A part in a protruding portion 110p is not covered by luminescent structural 120 between luminescent structural 120 and substrate 110
Multiple protruding portion 110p is exposed to the periphery of luminescent structural 120.
The upper surface for exposing substrate 110 by the separated region on 120 periphery of luminescent structural, can reduce light emitting diode
The bending (bowing) of chip 100 in the fabrication process.This prevents the damages because of luminescent structural 120 caused by being bent
And improve the manufacture yield of light-emitting diode chip for backlight unit.Also, the bending reduces and can reduce and be applied to luminescent structural 120
Stress, so as to the thickness of more unfertile land processing substrate 110.Thus, it is possible to provide the warp with about 90 μm of relatively thin thickness below
The light-emitting diode chip for backlight unit 100 of slimming.It is related to this, below by the embodiment stated in more detail to light-emitting diodes tube core
The manufacturing method of piece is illustrated.
Luminescent structural 120 includes the first conductive type semiconductor layer 121, on the first conductive type semiconductor layer 121
The second conductive type semiconductor layer 125, be located at and the first conductive type semiconductor layer 121 and the second conductive type semiconductor layer 125 between
Active layer 123.The first conductive type semiconductor layer 121, active layer 123 and the second conductive type semiconductor layer 125 may include III-V
Nitride-based semiconductor, such as, it may include such as the nitride-based semiconductor of (Al, Ga, In) N.The first conductive type semiconductor layer 121
May include p-type impurity (for example, Si, Ge, Sn), the second conductive type semiconductor layer 125 may include n-type impurity (for example, Mg, Sr,
Ba).Also, it can also be opposite with above content.Active layer 123 may include multiple quantum wells construction (MQW), be adjusted nitride-based half
The ratio of components of conductor, to project desired wavelength.In particular, in the present embodiment, the second conductive type semiconductor layer 125 can be
P-type semiconductor layer.
The first conductive type semiconductor layer 121 can have vertical side, can also have inclined side as shown in Figure 14
Face.In turn, the inclination angle of the inclined side can be gentler compared with inclination angle shown in Figure 14.For example, the inclined side
It gently can also be about 40 degree or less relative to the bottom surface of substrate 110.By gently forming the first conductive type semiconductor layer 121
Side can prevent from generating the defect such as cracking in the reflective insulating layer 140 of covering luminescent structural 120 and substrate 110.
Also, luminescent structural 120 includes table top 120m.Table top 120m can be located at the first conductive type semiconductor layer 121
On a part of region, including active layer 123 and the second conductive type semiconductor layer 125.Therefore, can expose on the periphery of table top 120m
A part of the first conductive type semiconductor layer 121.Also, the side of table top 120m can be substantially along light-emitting diode chip for backlight unit 100
Side positioning, thus the flat shape of table top 120m can be in form similar with the flat shape of light-emitting diode chip for backlight unit 100.Example
Such as, the flat shape that table top 120m can be rectangle.However, the present invention is not limited to this.Also, table top 120m may include
One side 120a, third side 120c, second side 120b and and the second side being reversed in position with first side 120a
The 4th side 120d that 120b is reversed in position.
Table top 120m may include first part 120m1And second part 120m2.The first part 120m of table top 120m1Including
At least one groove 120g formed from the side-facing depressions of table top 120m.In one embodiment, table top 120m may include multiple
Groove 120g, multiple groove 120g can form first part 120m1At least three sides.As shown, multiple grooves
120g can be made to second side 120b, third side 120c and the 4th side 120d.Groove 120g can provide the first weldering
The region that electrode 151 and the first conductive type semiconductor layer 121 are in electrical contact is padded, and then can provide the region of Ohmic contact.
Also, groove 120g be formed as from the one side of table top 120m more towards the central part of table top 120m then width more
Reduced form.It, can be more steady when as a result, below forming the side of the 151 covering groove 120g of the first pad electrode stated
Surely the first pad electrode 151 is formed, therefore can prevent the first pad electrode 151 from removing from reflective insulating layer 140.However,
It's not limited to that for the form of groove 120g, and the side of groove 120g may include plane and/or curved surface.In one embodiment, may be used
Regularly configuration trench 120g.For example, as shown, a groove 120g is to be nearly seated at the middle section of third side 120c
Mode formed, positioned at the groove 120g of second side 120b and the 4th side 120d can be located at same line on mode
(for example, the center of groove 120g is positioned along B-B' line) configuration.Groove 120g can be formed as follows as a result: with from platform
It is symmetrical on the basis of the specific straight line (imaginary line) that the first side 120a of face 120m extends to third side 120c.As schemed
Show, in one embodiment, groove 120g can be configured to it is symmetrical on the basis of A-A' line, in turn, the flat shape of table top 120m
It can also be in the symmetrical form on the basis of A-A' line.By symmetric construction, it can be achieved that symmetrical luminous pattern.
Table top 120m includes the groove 120g configured as above content, thus provides the formed by groove 120g
The contact area of one conductive-type semiconductor layer 121 and the first pad electrode 151.Also, formed groove 120g can will because formed institute
It states light-emitting area caused by contact area and reduces minimum, improve current dissipation efficiency.It is related to this, referring to Figure 16 more
It is described in detail.
Contact electrode 130 is located on the second conductive type semiconductor layer 125.Contact electrode 130 can partly be led with the second conductive type
125 Ohmic contact of body layer.Contacting electrode 130 may include transparent electrode.Transparent electrode for example may also include such as tin indium oxide
(Indium Tin Oxide, ITO), zinc oxide (Zinc Oxide, ZnO), zinc indium tin oxide (Zinc Indium Tin
Oxide, ZITO), indium zinc oxide (Zinc Indium Oxide, ZIO), zinc-tin oxide (Zinc Tin Oxide, ZTO), oxidation
Gallium indium tin (Gallium Indium Tin Oxide, GITO), indium gallium (Gallium Indium Oxide, GIO), oxidation
Zinc gallium (Gallium Zinc Oxide, GZO), aluminium-doped zinc oxide (Aluminum doped Zinc Oxide, AZO), fluorine are mixed
The transparent conductive oxide of miscellaneous tin oxide (Fluorine Tin Oxide, FTO) etc. and the translucency metal of such as Ni/Au
At least one of layer.The electroconductive oxide may also include various dopants.
In particular, including that the contact electrode 130 of transparent conductive oxide and ohm of the second conductive type semiconductor layer 125 connect
It is higher to touch efficiency.That is, the electroconductive oxide of such as ITO or ZnO and the contact resistance of the second conductive type semiconductor layer 125 are lower than
The contact resistance of metallic electrode and the second conductive type semiconductor layer 125, therefore include connecing for electroconductive oxide by application
Touched electrode 130 can reduce the forward voltage (V of light-emitting diode chip for backlight unit 100f) and improve luminous efficiency.In particular, as this implementation
In the case where the same small light-emitting diode chip driven with lower current density of the light-emitting diode chip for backlight unit 100 of example, drop
It is low contact electrode 130 and the second conductive type semiconductor layer 125 contact resistance and improve Ohm characteristic, thus can more effectively mention
High-luminous-efficiency.Also, electroconductive oxide is less than metallicity electricity from the probability of nitride-based semiconductor layer removing (peeling)
Pole, therefore there is the reliability with higher of light-emitting diode chip for backlight unit 100 of the contact electrode 130 including electroconductive oxide.
On the other hand, the current dissipation efficiency of electroconductive oxide in the horizontal direction is relatively lower than metallic electrode, but the present embodiment
Light-emitting diode chip for backlight unit 100 has about 70000 μm2Horizontal sectional area below, thus because current dissipation efficiency decline caused by
Luminous efficiency decline is very small or hardly declines.Therefore, by will include that the contact electrode 130 of electroconductive oxide is applied
To light-emitting diode chip for backlight unit 100, electrical property can be improved, improve luminous efficiency.
There is no restriction for the thickness of contact electrode 130, can have aboutExtremelyThickness.E.g., including ITO's
Contact electrode 130 is formed as aboutThickness.Since contact electrode 130 has the thickness of above range, can make
Electric current successfully disperses in the horizontal direction and improves the electrical property of light-emitting diode chip for backlight unit 100.
Contact electrode 130 is formed in such a way that the upper surface for substantially covering the second conductive type semiconductor layer 125 is whole, thus
When driving light-emitting diode chip for backlight unit 100, current dissipation efficiency can be improved.For example, the side of contact electrode 130 can be along table top
The side of 120m is formed.Also, contacting electrode 130 includes the opening portion for exposing the second conductive type semiconductor layer 125 locally
130b.Second pad electrode 153 described below is formed in a manner of at least partially filling opening portion 130b, thus can be increased
The contact area of second pad electrode 153.The second pad electrode 153 can be effectively prevented as a result, from contact electrode 130 or shine
Tectosome 120 is removed.
Reflective insulating layer 140 covers the upper surface and side of luminescent structural 120, and covers contact electrode 130.And
And reflective insulating layer 140 can be to extend to the side exposed in the upper surface of the substrate 110 on the periphery of luminescent structural 120
Formula is formed.Reflective insulating layer 140 can connect with the upper surface of substrate 110 as a result, therefore can more stably configure covering and shine
The reflective insulating layer 140 of the side of tectosome 120.Also, reflective insulating layer 140 may extend to the top rib of substrate 110
Angle part and formed.The reflective insulating layer 140 for covering the upper surface of substrate 110 exposed can be along the protruding portion of substrate 110
110p is formed, therefore as shown in the enlarged drawing of Figure 14, and the surface for covering the reflective insulating layer 140 of the upper surface of substrate 110 can
With recess portion and protrusion.
Reflective insulating layer 140 have expose the first conductive type semiconductor layer 121 locally third opening portion 140a,
And the 4th opening portion 140b positioned at the top of table top 120m.However, the present invention is not limited to this, reflective insulating layer 140
The upper surface of substrate 110 can also locally be covered and expose a part of upper surface of substrate 110.
On the other hand, the third opening portion 140a of reflective insulating layer 140 can at least partially make to reveal by groove 120g
The first conductive type semiconductor layer 121 out exposes.At this point, being prevented by the side of 140 covering groove 120g of reflective insulating layer
Electric short circuit caused by being contacted because of the first pad electrode 151 with the side of luminescent structural 120.Third opening portion 140a can be used as
Allow the access of the first conductive type semiconductor layer 121 with the first pad electrode 151 being electrically connected.
However, third opening portion 140a has dew together with the first area 140a1 covered by the first pad electrode 151 together
Out to the external second area 140a2 of the first pad electrode 151.As a result, extremely by the region of third opening portion 140a exposing
Few a part may include the first pad electrode 151 be electrically connected with the first conductive type semiconductor layer 121, in turn Ohmic contact first
Contact area 151c.Third opening portion 140a is formed as the form substantially similar with groove 120g.
4th opening portion 140b of reflective insulating layer 140 is located at the top of table top 120m.4th opening portion 140b can make
Contact electrode 130 locally exposes.4th opening portion 140b can be used as allowing contacting electrode 130 and the second pad electrode 153
The access of electrical connection.On the other hand, in some embodiments, the opening portion 130b of the 4th opening portion 140b and contact electrode 130
Position it is corresponding and position.At this point, the size of the 4th opening portion 140b is greater than the size of the opening portion 130b of contact electrode 130,
Thus locally expose the upper surface of contact electrode 130 in the 4th opening portion 140b.It is connect by what the 4th opening portion 140b exposed
At least part region of touched electrode 130 can be electrically connected with the second pad electrode 153.Therefore, contact electrode 130 may include contact
The second contact area 153c that electrode 130 is electrically connected with the second pad electrode 153.
Reflective insulating layer 140 may include translucency insulating properties substance, such as may include SiO2、SiNx、MgF2Deng.Also,
Reflective insulating layer 140 can have the thickness for being thicker than contact electrode 130.Reflective insulating layer 140, which can provide, as a result, is enough to make to lead to
Cross the thickness that the light of the insulating layer can be transmitted in the first pad electrode 151 and the reflection of the second pad electrode 153.In this implementation
In example, reflective insulating layer 140 may include SiO2, such as can have the thickness of about 540nm.
In some embodiments, reflective insulating layer 140 may also include distributed Bragg reflector.The distribution bragg
Reflector can be formed in a manner of the different dielectric layer of refractive index repeatedly lamination, and the dielectric layer may include TiO2、
SiO2、HfO2、ZrO2、Nb2O5、MgF2Deng.For example, reflective insulating layer 140 can have the TiO of alternately lamination2Layer/SiO2Layer
Construction.Each layer of distributed Bragg reflector can have 1/4 optical thickness of specific wavelength, be formed as 4 pairs to 20 pairs
(pairs).The topmost layer of reflective insulating layer 140 can be by SiNxIt is formed.By SiNxThe moisture resistance of the layer of formation is excellent, can protect
Influence of the hair care luminous diode chip from moisture.
In the case where reflective insulating layer 140 includes distributed Bragg reflector, reflective insulating layer 140 may include about
0.2 μm to 1.0 μ m thicks by SiO2The boundary layer of formation and on the boundary layer according to specific period lamination TiO repeatedly2
Layer/SiO2Lamination made of layer constructs.The distributed Bragg reflector can visible reflectance with higher.The distribution
Bragg reflector can design as follows: incidence angle is 0~60 °, has 90% to the light that wavelength is 400~700nm
Above reflectivity.It can be by type, thickness, the lamination period of multiple dielectric layers etc. for forming distributed Bragg reflector
It is controlled and the distributed Bragg reflector with above-mentioned reflectivity is provided.Light (the example to opposite long wavelength can be formed as a result,
Such as, the light of 550nm to 700nm) and opposite short wavelength are (for example, distribution Bradley of the 400nm to 550nm) reflectivity with higher
Lattice reflector.
As described above, the distributed Bragg reflector may include multiple lamination construction, so as to distributed Bragg reflector
To the light of wider wave band reflectivity with higher.That is, the distributed Bragg reflector may include having first thickness
Second lamination structure made of the construction of first lamination made of dielectric layer lamination and the dielectric layer lamination with second thickness
It makes.For example, the distributed Bragg reflector may include with the light for being less than the central wavelength (about 550nm) relative to visible light
First lamination made of dielectric layer lamination for the thickness of 1/4 optical thickness constructs and has and is thicker than relative to visible light
Central wavelength (about 550nm) light be 1/4 optical thickness thickness dielectric layer lamination made of the second lamination construct.
In turn, the distributed Bragg reflector may also include third lamination construction, and the third lamination construction is that have to be thicker than relatively
In the light of the central wavelength (about 550nm) of visible light be 1/4 optical thickness thickness dielectric layer, with have be thinner than it is opposite
Lamination forms the dielectric layer of thickness of optical thickness for being 1/4 in the light repeatedly.
First pad electrode 151 and the second pad electrode 153 are located on reflective insulating layer 140, are located at table top
The first part 120m of 120m1And second part 120m2On.In turn, the first pad electrode 151 and the second pad electrode 153 can divide
It is not adjacent with the first side 120a of table top 120m and third side 120c and position.First pad electrode and the second pad electrode
153 respective at least part are located on table top 120m, and especially the first pad electrode 151 can pass through reflective insulating layer 140
Upper surface and side insulation with table top 120m.Also, the first area of the first pad electrode 151 covering third opening portion 140a
140a1, far from second area 140a2.A part in first side of the pad electrode 151 far from third opening portion 140a and
It is formed between the side of third opening portion 140a and first pad electrode 151 and separates space.Therefore, third opening portion 140a
Second area 140a2 be located at the outside of the first pad electrode 151, the first conductive type exposed by second area 140a2
The region of semiconductor layer 121 also is located at the outside of the first pad electrode 151.It first is led by the way that second area 140a2 exposes
The region of electric type semiconductor layer 121 can be covered in flip-chip bond light-emitting diode chip for backlight unit by engagement material.It is right again later
Above content is illustrated.
The a part for making the first pad electrode 151 covering third opening portion 140a, thus can be in small light-emitting diode core
In the limited scope of design of piece, the size of third opening portion 140a is relatively largely formed.In the undersized of opening portion
In the case of, it is difficult to it is etched and insulating layer residual, and the usually size of opening portion due to overetch (over etching)
Changing can be more serious.In the case where third opening portion 140a is completely covered in the first pad electrode 151, because of third opening portion
Change occurs for the size of 140a and the variation of contact resistance can be more serious.In this regard, can be by having third opening portion 140a
Second area 140a2 and the size for increasing third opening portion 140a, even and if then the size of third opening portion 140a change,
The variation of the contact area of first pad electrode 151 also becomes smaller than the change in size of third opening portion 140a relatively.Therefore, energy
Enough contacts area for providing the first pad electrode 151 with high yield change the electricity between less and manufactured light-emitting diode chip for backlight unit
Performance changes less light-emitting diode chip for backlight unit such as forward voltage.
On the other hand, it is located at first part 120m1On the first pad electrode 151 can by third opening portion 140a with
The first conductive type semiconductor layer 121 is electrically connected, and then can Ohmic contact.In particular, the first pad electrode 151 can be to cover table top
The mode of the side of 120m is formed, and the side of table top 120m and the first pad electrode 151 pass through reflective insulating layer 140 at this time
Insulation.The portion that the first conductive type semiconductor layer 121 exposed as a result, by groove 120g is contacted with the first pad electrode 151
Divide and is formed as the first contact area 151c.In the present embodiment, the first area 140a2 of third opening portion 140a can have and the
The identical area of one contact area 151c, but the present invention is not necessarily limited to this, it below will be right again in the embodiment stated
Above content is illustrated.
On the other hand, can locally expose the first conductive type by the second area 140a2 of third opening portion 140a partly to lead
Body layer 121 can ensure process range by second area 140a2, therefore the manufacture that light-emitting diode chip for backlight unit 100 can be improved produces
Rate.
Positioned at second part 120m2On the second pad electrode 153 can pass through the 4th opening portion 140b and contact electrode
130 electrical connections.At this point, at least part in the region that the second pad electrode 153 is contacted with contact electrode 130 is formed as second and connects
Touch region 153c.In the case where contacting electrode 130 includes opening portion 130b, the second pad electrode 153 can be with the second conductive type
Semiconductor layer 125 contacts.However, in the case, connecing between the second pad electrode 153 and the second conductive type semiconductor layer 125
Electric shock resistance is higher than the second pad electrode 153 and contacts the contact resistance between electrode 130, therefore is led by the second pad electrode 153
The probability of logical current direction contact electrode 130 is higher.For example, the second pad electrode 153 and the second conductive type semiconductor layer 125
Schottky contacts can be formed.Therefore, it can will be sent out due to the second pad electrode 153 is contacted with the second conductive type semiconductor layer 125
Raw current concentrated (current crowding) is minimized.
Referring to Fig.1 6, when driving light-emitting diode chip for backlight unit 100, electric current can connect from the second contact area 153c by first
Touch region 151c conducting.In the case where groove 120g is formed at least three side of table top 120m, exposing in groove
121 surface of the first conductive type semiconductor layer of 120g forms the first contact area 151c, therefore electric current can be supplied successfully to platform
The first part 120m of face 120m1Lateral parts.Therefore, electric current can be made at light emitting region (active layer 123 of table top 120m)
Entire surface is uniformly dispersed.
In particular, in the case where the first conductive type semiconductor layer 121 is n-type semiconductor layer, in driving light-emitting diodes tube core
When piece 100, electronics (electron) disperses from the first contact area 151c towards the direction of the second contact area 153c.At this point,
The mobility (mobility) of electronics is higher than electric hole, therefore can be uniformly dispersed to the second contact area 153c and first side
Region between 120a, on the contrary, electric hole is difficult to be dispersed to the rear of the first contact area 151c.According to the present embodiment, first
The part of contact area 151c formation to formation groove 120g, therefore electric current can be made to be uniformly dispersed to first part 120m1's
Corner region (region with flank abutment) and the almost whole region in table top 120m equably shines.Therefore, hair can be improved
The luminous efficiency of the lesser small light-emitting diode chip 100 of light area.
Also, since groove 120g is formed at least three sides of table top 120m, can will in order to the first conduction
The area that type semiconductor layer 121 forms electrical connection and removes the part of light emitting region minimizes.Can have as a result, compared with small area
Embodiment light-emitting diode chip for backlight unit 100 in, the reduction of light-emitting area is minimized and improves luminous power.
On the other hand, first contact area farthest away from the second contact area 153c in the first contact area 151c
The most short D2 separated by a distance of 151c to the second contact area 153c can be 200 μm or less.That is, as shown in figure 16, from the second contact
The most short D2 separated by a distance of region 153c to the first contact area 151c adjacent with third side 120c can be 200 μm or less.
For example, in the case where most short D2 separated by a distance is more than 200 μm, electric current will not be farthest away from the first of the second contact area 153c
The periphery of contact area 151c is uniformly dispersed, so that luminous efficiency is reduced.In particular, being in contact electrode 130 includes ITO's etc.
In the case where electroconductive oxide, if reason contact electrode 130 generate the current dissipation limit and will most short D2 separated by a distance
200 μm are set as hereinafter, then can more improve current dissipation efficiency.However, the present invention is not limited to this.
First pad electrode 151 and the second pad electrode 153 can be respectively provided with and be formed first pad electrode 151 and
The surface of the bottom surfaces of the part of second pad electrode 153 is distributed corresponding upper surface distribution.First pad electrode 151 as a result,
It may include the inclined side on the 140a of third opening portion, the second pad electrode 153 may include being located at the 4th opening portion
Recess portion 153a on 140b.As described above, being formed on the surface of the first pad electrode 151 and the second pad electrode 153 has rank
The surface of difference produces so that the contact area of the first pad electrode 151 and the second pad electrode 153 will increase in the part of contact
It gives birth to scale and prevents the first pad electrode 151 and the second pad electrode 153 from removing.In particular, including opening portion in contact electrode 130
In the case where 130b, the second pad electrode 153 forms the recess portion 153a with rib portion, can more efficiently prevent from the second pad electrode
153 removings.Also, scale and light-emitting diode chip for backlight unit are formed on the surface of the first pad electrode 151 and the second pad electrode 153
100 more stably can then arrive the second substrate 1000.
On the other hand, it can relatively very ninor feature be separated at the first pad electrode 151 and the most short of the second pad electrode 153
Distance D1 may be, for example, about 3 μm to about 100 μm, and then can be about 80 μm.Covering luminescent structural 120 can be stably formed
The reflective insulating layer 140 of side, so engage light-emitting diode chip for backlight unit 100 illustrated in the embodiment as follows that will be stated
It can be formed in a manner of covering to the side of light-emitting diode chip for backlight unit 100 to the joint portion of the second substrate 1,000 211,213.By
This, is without ensuring by the process range of the most short D1 separated by a distance of the first pad electrode 151 and the second pad electrode 153 generation,
So as to which the most short D1 separated by a distance of the first pad electrode 151 and the second pad electrode 153 is reduced to minimum limit.Also,
The small light-emitting diode chip 100 of the present embodiment is driven with lower current density, therefore can more reduce the first pad electrode
151 and second pad electrode 153 it is most short separated by a distance.By by the first pad electrode 151 and the second pad electrode 153 most
Short D1 separated by a distance is formed as above range, and the radiating efficiency of light-emitting diode chip for backlight unit 100 can be improved.First pad electrode 151
Area and the second pad electrode 153 the sum of area can for the horizontal sectional area of light-emitting diode chip for backlight unit 100 about 50% with
It is upper and 95% or less.By being upper by the ratio set of the horizontal sectional area of the first pad electrode 151 and the second pad electrode 153
Range is stated, the light reflection carried out by the first pad electrode 151 and the second pad electrode 153 can be enhanced and improve luminous efficiency.
However, under specific purpose, it, can also be to the first pad electrode 151 and second in addition to projecting light to 110 side of substrate
Project light in 153 side of pad electrode.For example, contact electrode 130 formed by translucent material, and reflective insulating layer 140 by
In the case that transmission substance is formed, a part of the light projected from active layer 123 can be to the first pad electrode 151 and the second weld pad
It projects in region between electrode 153.Thus, it is possible to provide the light-emitting diode chip for backlight unit of light is projected to both direction, in the case,
The size of the first pad electrode 151 and the second pad electrode 153 can also smaller be formed.
Figure 17 to Figure 19 is the approximate vertical view to illustrate the light-emitting diode chip for backlight unit of another embodiment of the present invention, figure
20a, Figure 20 b, Figure 21 a and Figure 21 b are the sectional views to illustrate the light-emitting diode chip for backlight unit of another embodiment of the present invention.Figure
17 to Figure 21 b be figure corresponding with Figure 11 to Figure 15 respectively.
Referring to Fig.1 7 to Figure 21 b, the light-emitting diode chip for backlight unit of the present embodiment and embodiment described before shine two
Pole pipe chip is substantially similar, however the position of the third opening portion 140a of reflective insulating layer 140 and/or size have differences.
The third opening portion 140a of the light-emitting diode chip for backlight unit of embodiment before is limited to the upper table of the first conductive type semiconductor layer 121
The top in face and expose the upper surface of the first conductive type semiconductor layer 121.In contrast, in the light emitting diode of the present embodiment
In chip, third opening portion 140a is from the top of the upper surface of the first conductive type semiconductor layer 121 to the first conductive type semiconductor
The top of the side of layer 121 extends, and in turn, extends to the top of substrate 110.That is, third opening portion 140a can not only make to expose
Expose in the upper surface of the first conductive type semiconductor layer 121 of groove 120g, and the first conductive type semiconductor layer 121 can be made
Side is exposed, and then the upper surface of substrate 110 can be made to expose.A side end of Figure 20 a and Figure 21 a expression third opening portion 140a
Positioned at the side of the first conductive type semiconductor layer 121, Figure 20 b and Figure 21 b indicate that a side end of third opening portion 140a is located at
On the upper surface of substrate 110.
Also, identical as embodiment described before, the third opening portion 140a has first area 140a1 and the
Two region 140a2.First area 140a1 can be identical as the first area 140a1 of embodiment before, however, second area
140a2 can be greater than before embodiment second area 140a2.
Second area 140a2 is the region not covered by the first pad electrode 151, as a result, being exposed to the first weld pad electricity
The outside of pole 151.Second area 140a2 is covered when circuit board is arrived in the engagement of light-emitting diode chip for backlight unit 100 by engagement material.With
Expose the side of the first conductive type semiconductor layer 121 and then the mode for exposing the upper surface of substrate 110 forms third opening portion
Thus 140a can provide relatively large third opening portion 140a in small-sized light-emitting diode chip for backlight unit 100, so as to make
Process stabilisation is made, in turn, the physics and electrical property deviation of light-emitting diode chip for backlight unit can be reduced.
Also, the filling engagement material in second area 140a2, so can be prevented when engaging light-emitting diode chip for backlight unit 100
100 skew of light-emitting diode chip for backlight unit or disengaged position.
Figure 22 to Figure 26 is the figure to illustrate the light-emitting diode chip for backlight unit of another embodiment of the present invention, each figure and Figure 11
It is corresponding to Figure 15.
Referring to Figure 22 to Figure 26, the light-emitting diode chip for backlight unit 300 of the present embodiment and 1 to Figure 15 or Figure 17 referring to Fig.1 to figure
The embodiment that 21b is illustrated is substantially similar, but further includes the hole for exposing the first conductive type semiconductor layer 121 in table top 120m
It is had differences in terms of 120h.In hole, the side wall of 120h exposes active layer 123 and the second conductive type semiconductor layer 125.
Hole 120h is far from groove 120g.Hole 120h is configured into the ditch for being formed in second side 120b and the 4th side 120d
Between slot 120g, but it is not necessarily limited to this.The center of hole 120h, which can be located at, is formed in second side 120b and the 4th side
Centre between the groove 120g of 120d, but not limited to this, in order to facilitate current dissipation, can also more connect from the centre
Close or remote from the groove 120g for being formed in third side 120c.
Contact electrode 130 surrounds the hole 120h.Electric short circuit in order to prevent, contact electrode 130 is far from exposing in hole
The first conductive type semiconductor layer 121 and active layer 123 of 120h.
On the other hand, the active layer 123 and the second conductive type in the side wall of hole 120h are exposed in the covering of reflective insulating layer 140
Semiconductor layer 125.Reflective insulating layer 140 further includes making the first conductive type in the 120h of hole in addition to the 140a of third opening portion
The opening portion 140c that semiconductor layer 121 exposes.A part of region of third opening portion 140a, i.e. first area 140a1 are by first
Pad electrode 151 covers, and second area 140a2 is exposed to the outside of the first pad electrode 151, but opening portion 140c is all by the
The covering of one pad electrode 151.
First pad electrode, 151 through hole 120h and be connected to the first conductive type semiconductor layer 121, therefore can more strengthen electricity
Flow point dissipates.
On the other hand, the technical characteristic of before illustrated Figure 11 to Figure 15 or Figure 17 to Figure 21 b can be equally applied to
The light-emitting diode chip for backlight unit 300 of the present embodiment.Therefore, third opening portion 140a includes first area 140a1 and second area
140a2, in turn, second area 140a2 can be limited on the upper surface of the first conductive type semiconductor layer 121, or except the first conduction
The upper surface of type semiconductor layer 121 is extended with the side of export-oriented the first conductive type semiconductor layer 121, and then can be on substrate 110
Extend.
Figure 27 to Figure 31 is the figure of another embodiment of the present invention, and each figure is corresponding with Figure 11 to Figure 15.
Referring to Figure 27 to Figure 31, the light-emitting diode chip for backlight unit 400 of the present embodiment and referring to Fig.1 1 to Figure 15, Figure 17 to figure
The light-emitting diode chip for backlight unit 100,200,300 that 21b or Figure 22 to Figure 26 is illustrated is substantially similar, but is further including extending electrode
135 aspect has differences.
Extending electrode 135 can be with 121 Ohmic contact of the first conductive type semiconductor layer.Extending electrode 135 can be along table top 120m
Second side 120b and the 4th side 120d formed.Extending electrode 135 can not only form second side 120b and the 4th side
Face 120d, and third side 120c can be formed.Groove 120g can be formed in order to form extending electrode 135, but not
Required groove 120g.
On the other hand, the third opening portion 140a of reflective insulating layer 140 exposes extending electrode 135, and then makes first
Conductive-type semiconductor layer 121 exposes.It is identical as embodiment described before, the third opening portion of reflective insulating layer 140
140a has the first area 140a1 covered by the first pad electrode 151 and exposes the of the outside of the first pad electrode 151
Two region 140a2.First area 140a1 can be located at the top of the extending electrode 135 with limiting, but be not necessarily limited to
This.Therefore, the first pad electrode 151 can also be contacted with the first conductive type semiconductor layer 121.
First pad electrode 151 can be electrically connected to the first conductive type semiconductor layer 121 by the extending electrode 135.
Extending electrode 135 and 121 Ohmic contact of the first conductive type semiconductor layer, therefore the first pad electrode 151 can also be by with first
The substance of 121 Ohmic contact of conductive-type semiconductor layer is formed.Therefore, the material of the first pad electrode 151 and the second pad electrode 153
Material range of choice becomes wider.
The light-emitting diode chip for backlight unit 400 of the present embodiment includes extending electrode 135, therefore can more strengthen light-emitting diode chip for backlight unit
Current dissipation in 400.
Figure 32 a to Figure 37 b is the manufacturing method to illustrate the light-emitting diode chip for backlight unit 100 of another embodiment of the present invention
Top view and sectional view.
Omit the detailed description of the composition substantially the same with the composition illustrated in above-described embodiment.Also, below
By in the figure for the embodiment stated, the method for indicating two light-emitting diode chip for backlight unit 100 of manufacture, but the present invention is not limited to this.
Multiple luminous the two of three or more are formed the case where manufacturing single light-emitting diode chip for backlight unit 100 and on the chip of large area
It, can also be using the manufacturing method of the light-emitting diode chip for backlight unit 100 of embodiment described below in the case where pole pipe chip 100.And
And in the present embodiment, the method for manufacture light-emitting diode chip for backlight unit 100 is illustrated, but those skilled in the art should manage
Solution can also be similarly applied in the method for manufacture light-emitting diode chip for backlight unit 200,300 and 400.
In the various figures, line L1 is defined as the boundary line of unit element region UD1.That is, the luminescent structural 120 of two sides is with line
It is separated on the basis of L1, to may be produced that two light-emitting diode chip for backlight unit 100.Also, each sectional view indicates corresponding vertical view
The section of figure.For example, indicating the section of the top view of Figure 32 a in Figure 32 b.
Referring to Figure 32 a and Figure 32 b, luminescent structural 120 is formed on substrate 110.Luminescent structural 120 is usually available
Known various method growths, such as using Metalorganic chemical vapor deposition (Metal Organic Chemical
Vapor Deposition, MOCVD), molecular beam epitaxy (Molecular Beam Epitaxy, MBE) or hydrite vapor phase it is of heap of stone
Technology growths such as brilliant (Hydride Vapor Phase Epitaxy, HVPE).
Secondly, forming table top 120m and contact electrode 130 including groove 120g referring to Figure 33 a to Figure 33 b.In turn, office
It removes to portion luminescent structural 120 and forms the isolation channel 120i for exposing the upper surface of substrate 110.
Specifically, forming contact electrode 130 on luminescent structural 120 with reference first to Figure 33 a and Figure 33 b.
Contact electrode 130 can be formed on the second conductive type semiconductor layer 125 of luminescent structural 120 and with the second conduction
Type semiconductor layer 125 forms Ohmic contact.Contacting electrode 130 may include transparent conductive oxide and/or translucency metal.Example
Such as, forming contact electrode 130 may include using the evaporation coating method such as sputter and/or electron beam evaporation plating in the second conductive type semiconductor
ITO is formed on layer 125.However, forming contact electrode 130 may include other to form such as ZnO the present invention is not limited to this
Various transparent conductive oxides can apply various manufacturing processes according to the type of electroconductive oxide.
Then, referring to Figure 34 a and Figure 34 b, luminescent structural 120 is patterned and is formed including the second conductive type semiconductor
The table top 120m of layer 125 and active layer 123, table top 120m are formed as including multiple groove 120g from its side-facing depressions.In turn,
Luminescent structural 120 is patterned and forms perforation the second conductive type semiconductor layer 125, active layer 123 and the first conductive type half
Conductor layer 121 and the isolation channel 120i for exposing the upper surface of substrate 110.Such as using dry-etching and/or wet etching
Process patterns luminescent structural 120.
Luminescent structural 120 is divided into multiple luminous on constituent parts element area UD1 by isolation channel 120i
Tectosome 120.Therefore, isolation channel 120i can be formed by L1 along the line.As described above, form isolation channel 120i and by luminescent structural
120 are divided into multiple luminescent structurals 120 on multiple unit element region UD1, thus can mitigate because of substrate 110 and hair
The stress that coefficient of thermal expansion differences between light tectosome 120 generates.The hair when manufacturing light-emitting diode chip for backlight unit 100 can be reduced as a result,
The bending (bowing) of raw chip.
Contact electrode 130 can be patterned, may include being formed to make the second conductive type semiconductor by the contact patterning of electrode 130
The opening portion 130b that the upper surface of layer 125 is locally exposed.Such as it will be contacted using dry-etching and/or wet etching process
Electrode 130 patterns.
In the above-described embodiments, illustrate to be initially formed after contact electrode 130 and patterning luminescent structural 120, but this
It's not limited to that for invention.In embodiments, after can also first patterning luminescent structural 120, in the second conductive type half
Contact electrode 130 is formed in conductor layer 125.
Then, referring to Figure 35 a and Figure 35 b, reflective insulating layer 140 is formed, the insulating layer covers luminescent structural 120
Upper surface and side, including third opening portion 140a and the 4th opening portion 140b.
Forming reflective insulating layer 140 may include forming SiO using the generally known evaporation coating method of those of ordinary skill2Layer
And by the SiO2Pattern layers.The patterning process is executed using etching or stripping process.At this point, reflective insulating layer
140 can be formed in a manner of covering and extremely exposing in the upper surface of the substrate 110 of isolation channel 120i.
Also, forming reflective insulating layer 140 may include with forming the different metaboly of refractive index made of lamination point
Cloth Bragg reflector.For example, formed reflective insulating layer 140 may include using as sputter well known evaporation coating method alternately
Lamination SiO repeatedly2Layer and TiO2Layer.
Secondly, the first pad electrode 151 and second can be formed on reflective insulating layer 140 referring to Figure 36 a and Figure 36 b
Pad electrode 153.
First pad electrode 151 can pass through the third opening portion 140a and the first conductive type half of reflective insulating layer 140
Conductor layer 121 contacts, and can Ohmic contact.Similarly, the second pad electrode 153 can pass through the of reflective insulating layer 140
Four opening portion 140b and with contact electrode 130 contact and be electrically connected.First pad electrode 151 and the second pad electrode 153 can be by
The same process is formed together, such as can utilize optical lithography or removing skill after being formed by vapor deposition and/or plating process
Art patterning.
Then, referring to Figure 37 a and Figure 37 b, a part of 110a of substrate 110 is removed, the thickness of substrate 110 thus can be reduced
Degree.The thickness of multiple unit element region UD1 can thinning be thickness T1 as a result,.Hereafter, L1 divides substrate 110 along the line, thus may be used
Multiple light-emitting diode chip for backlight unit 100 as shown in Figure 11 to Figure 16 are provided.
A part of 110a for removing substrate 110 may include locally removing substrate 110 by physically and/or chemically method.
For example, locally removing substrate 110 using the methods of grinding, grinding.If reducing the thickness of substrate 110, because hot swollen
Swollen coefficient difference and in the state of wafer bending support chip substrate 110 it is thinning, therefore stress increase.It is applied to as a result, luminous
The stress of tectosome 120 increase and luminescent structural 120 a possibility that generating damage it is higher.But according to the present embodiment, subtracting
Before the thickness of small substrate 110, the isolation channel 120i that luminescent structural 120 is divided into multiple luminescent structurals 120 is formed, thus
The damage that bending can be mitigated, stress is mitigated and prevent the luminescent structural 120 that can be generated because the thickness of substrate 110 reduces.Especially
It, stress more reduces due to size relatively small unit element region UD1 for meeting, therefore the thickness of constituent parts element area UD1
It can be reduced to about 90 μm of thickness below.
It may include by delineation and breaking step of breaking separating base plate 110 that L1, which divides substrate 110, along the line.At this point, scoring procedure can
Internal processing is carried out to substrate 110 including the use of inside processing laser.At this point, using internal processing laser, it can
At least one modified region 111 in horizontally extending belt shape is formed in at least one side of substrate 110.At this point,
Modified region 111 can be formed with the depth of 30 μm to 35 μm of the upper surface far from substrate 110.This formation of modified region 111
To the lower section of isolation channel 120i, therefore there is no the loads that luminescent structural 120 is damaged in the process using internal processing laser
Sorrow.Therefore, modified region 111 can be formed in a manner of being relatively close to the upper surface of substrate 110, therefore from modified region 111
What it is to the upper surface of substrate 110 can be above range separated by a distance.As described above, can be to be relatively close to the upper table of substrate 110
The mode in face forms modified region 111, therefore can more be thinned light-emitting diode chip for backlight unit 100.
The light-emitting diode chip for backlight unit 100 and light emitting device of above-described embodiment include the part that the upper surface of substrate 110 is exposed
And reduce the wafer bending of light-emitting diode chip for backlight unit 100 in the fabrication process.The degree of wafer bending is smaller as a result, therefore can
The thickness for reducing substrate 110 as above content, can be improved the manufacture yield of light-emitting diode chip for backlight unit 100.Therefore it provides real
Now miniaturization and slimming and the higher light-emitting diode chip for backlight unit 100 of reliability and light emitting device.Also, reflective insulating layer
140 with cover luminescent structural 120 side and more cover to the upper surface of substrate 110 exposed, especially substrate 110 is prominent
The mode of portion 110p extends to form out, and the luminous efficiency of light-emitting diode chip for backlight unit 100 thus can be improved.Also, joint portion 211,
213 can be covered by this reflective insulating layer 140 to the side of light-emitting diode chip for backlight unit 100, therefore light emitting device can be realized
Miniaturization, can be improved the mechanical stability of light emitting device.
As described above, the mechanical stability and luminous efficiency of the light emitting device of embodiment it is excellent and realize miniaturization and it is slim
Change, therefore portable electronic device can be advantageously applied to.It as an example, can be by the light emitting device or light-emitting diode chip for backlight unit
100 are applied to the paper of relatively thin thickness are required to write plate (paper writing board).As another example, shine by described
In the case that device is applied to the input unit such as keyboard, the lower section of the keypad of the light emitting device can be located at and make keypad
It shines.In this input unit, keypad receives external stress (for example, pressurization to be inputted) repeatedly.Also,
Portable input device requires relatively thin thickness and lesser size.The light emitting device of embodiment realizes miniaturization and slimming,
Be consequently adapted to slim portable input device, and mechanical stability is excellent and light emitting device is because the movement of keyboard is (for example, apply
To the pressure of keypad) that undesirable probability occurs is very small.
Figure 38 is the light-emitting diode chip for backlight unit 100 with wavelength conversion section to illustrate another embodiment of the present invention
Summary section.Herein, light-emitting diode chip for backlight unit 100 and 1 to Figure 16 light-emitting diode chip for backlight unit being illustrated referring to Fig.1 before
100 is identical, therefore omits a part of duplicate instruction number.Also, in the present embodiment, illustrate light-emitting diode chip for backlight unit
100, but the light-emitting diode chip for backlight unit 200,300,400 of other embodiments can also be used.
Referring to Figure 38, wavelength conversion section 500 is configured on the face for projecting the substrate 110 of light.Wavelength conversion section 500 can wrap
Include transparent resin 510 and the fluorophor particle being dispersed in transparent resin 530.Fluorophor particle 530 can be evenly dispersed into
In ming tree rouge 510, but as shown, it can intensively arrive the lower side of wavelength conversion section 500, i.e. close to the side of substrate 110.Wavelength turns
Changing portion 500 can directly contact with substrate 110, such as be formed using screen painting or the technologies such as spraying.
Wavelength conversion section 500 is configured on the substrate 110 for projecting light, it thus can be to from the light that active layer 123 projects
At least part light carries out wavelength convert, therefore can realize the colour mixture light such as white light.
For example, light-emitting diode chip for backlight unit 100 can project blue light, wavelength conversion section 500 may include turning blue optical wavelength
Change the fluorophor particle 530 of sodium yellow or green light and red light into.Hereby it is achieved that blue light is penetrated with from fluorophor particle 530
The colour mixture light of conversion light out.
The light-emitting diode chip for backlight unit 100 in addition to blue light, can also according to the material of active layer 123 project ultraviolet light or
Green light.
Figure 39 is the light-emitting diode chip for backlight unit 100 with wavelength conversion section to illustrate another embodiment of the present invention
Summary section, Figure 40 are the perspective views of Figure 39.
Referring to Figure 39 and Figure 40, illustrated wavelength conversion section 500 is located at the top of substrate 110 and covers substrate before
110 top, but the difference of the wavelength conversion section 500 of the present embodiment is not only to cover the top of substrate 110, but also covers
Side.
Such as above-described embodiment, wavelength conversion section 500 can be directly provided on light-emitting diode chip for backlight unit 100, can be with luminous two
Pole pipe chip 100 encapsulates together or modularization.However, the present invention is not limited to this, it can also be with packaging body grade or module level
After light-emitting diode chip for backlight unit 100 is installed, provide on light-emitting diode chip for backlight unit 100.Later again to embodiment related to this
It is illustrated.
Figure 41 is the sectional view to illustrate the light emitting device of another embodiment of the present invention.
Referring to Figure 41, the light emitting device includes the second substrate 1000, the light emitting diode in the second substrate 1000
Chip 100, the first joint portion 211 and the second joint portion 213.
The second substrate 1000 can provide the region of installation light-emitting diode chip for backlight unit 100, may be, for example, LED package
Substrate or the substrate of light emitting module of body etc..The second substrate 1000 may include substrate 310 and the electric conductivity in substrate 310
Pattern 320, conductive pattern 320 may include the first conductive pattern 321 and the second conductive pattern 323.The second substrate 1000
It may include conductive board, insulative substrate or printed circuit board (PCB).In turn, the second substrate 1000 can be firm substrate,
But not limited to this, can also be the transparent substrate of flexible (flexible).Light-emitting diode chip for backlight unit 100 is not flexible
Property, but light-emitting diode chip for backlight unit 100 of the invention can provide and make slim small chip, therefore can be by arranging multiple this cores
Piece and flexible lamp paper or very thin lamp bar are provided.
First conductive pattern 321 and the second conductive pattern 323 are electrically isolated from one.For example, the first conductive pattern 321
It being capable of separating and be electrically insulated separated by a distance with interval D 4 with the second conductive pattern 323.At this point, the first conductive pattern 321
And second conductive pattern 323 can be electrically connected respectively to the first pad electrode 151 and the second weld pad of light-emitting diode chip for backlight unit 100
Electrode 153.However, the present invention is not limited to this, as long as no limitation: the second substrate 1000 can provide peace in following construction
The region for filling light-emitting diode chip for backlight unit 100 is electrically connected with the formation of light-emitting diode chip for backlight unit 100.
Light-emitting diode chip for backlight unit 100 is located in the second substrate 1000, is electrically connected with the second substrate 1000.Herein, with reference
The light-emitting diode chip for backlight unit 100 is carried out for the light-emitting diode chip for backlight unit 100 for the embodiment that Figure 11 to Figure 16 is illustrated
Illustrate, but be not restricted to this, what can be illustrated for 7 to Figure 21 b, Figure 22 to Figure 26 or Figure 27 to Figure 31 referring to Fig.1 shines
Diode chip for backlight unit 200,300,400.
First joint portion 211 and the second joint portion 213 between light-emitting diode chip for backlight unit 100 and the second substrate 1000 and
The second substrate 1000 is arrived into the engagement of light-emitting diode chip for backlight unit 100, and is electrically connected to each other.It first joint portion 211 can be with luminous two
First pad electrode 151 of pole pipe chip 100 contacts, and contacts with the first conductive pattern 321 of the second substrate 1000.With this phase
Seemingly, the second joint portion 213 can be contacted with the second pad electrode 153 of light-emitting diode chip for backlight unit 100, with the second substrate 1000
The contact of two conductive patterns 323.As long as the first joint portion 211 and the second joint portion 213 are following substance, no limitation: will send out
Luminous diode chip 100 is electrically connected with the second substrate 1000, and is engaged with each other.First joint portion 211 and 213, the second joint portion
It such as may include solder, or can be Markite, such as electric conductivity solid.
Also, at least one of the first joint portion 211 and the second joint portion 213 can be with light-emitting diode chip for backlight unit 100
At least part of side contacts.In one embodiment, at least one of the first joint portion 211 and the second joint portion 213 can
From at least part of the side of luminescent structural 120 covering reflective insulating layer 140.In turn, the first joint portion 211 can cover
Expose at least part in the lower surface of the substrate 110 on 120 periphery of luminescent structural, and then can also cover the side of substrate 110
At least part in face.
As described above, at least one of the first joint portion 211 and the second joint portion 213 with light-emitting diode chip for backlight unit
The mode of at least part contact of 100 side is formed, thus most short between the first joint portion 211 and the second joint portion 213
D3 can be greater than the most short D1 separated by a distance between the first pad electrode 151 and the second pad electrode 153 separated by a distance.Therefore, even if
Form most short D1 separated by a distance (for example, about 3 μm to 100 μm) smaller, can also shorter D1 separated by a distance larger formed most
Short D3 separated by a distance, therefore when installing light-emitting diode chip for backlight unit 100, electric short circuit can be prevented.In particular, light emitting diode
The reflective insulating layer 140 of chip 100 steadily covers the side of luminescent structural 120, so even the first joint portion 211
And/or second joint portion 213 contacted with the side of light-emitting diode chip for backlight unit 100, electrical problems will not be generated.In particular, reflective
Property insulating layer 140 extends to the upper surface of substrate 110 exposed and is formed, therefore can make the side of luminescent structural 120 more
It steadily insulate, to prevent the electric short circuit as caused by joint portion 211,213 and the side of luminescent structural 120.
Also, the area that joint portion 211,213 is contacted with light-emitting diode chip for backlight unit 100 increases and can more stably install hair
Luminous diode chip 100, therefore the mechanical stability of light emitting device can be improved.In turn, joint portion 211,213 can be reduced to be interposed
Thickness between light-emitting diode chip for backlight unit 100 and the second substrate 1000 is (that is, light-emitting diode chip for backlight unit 100 and the second substrate 1000
Between separated by a distance), therefore can be by light emitting device smallerization and slimming.
On the other hand, the first joint portion 211 can pass through the second area 140a2 of the third opening portion 140a of insulating layer 140
And it is contacted with the first conductive type semiconductor layer 121 or substrate 110.First joint portion 211 can by with the first conductive type semiconductor layer
The material of 121 Schottky contacts is formed.Even if the first joint portion 211 is contacted with the first conductive type semiconductor layer 121 as a result,
The forward voltage of light-emitting diode chip for backlight unit 100 will not be had an impact.It therefore, can by increasing the area of second area 140a2
Electrical property is not had an impact and makes process more stableization.
In the present embodiment, it is illustrated to installing light-emitting diode chip for backlight unit 100 on substrate 1000, but it can also be as reference
Figure 38 and Figure 39 is illustrated the light-emitting diode chip for backlight unit 100 that wavelength conversion section 500 is applied in the installation equally on substrate 1000.
Figure 42 is the summary section to illustrate the light emitting device of another embodiment of the present invention.
Referring to Figure 42, the light emitting device of the present embodiment and the light emitting device being illustrated referring to Figure 41 are substantially similar, but
The interval D 4 provided between the first conductive pattern 321 and the second conductive pattern 323 of substrate 1000 is greater than the first weld pad
It is had differences in terms of most short D1 separated by a distance between electrode 151 and the second pad electrode 153.First joint portion 211 and
It two joint portions 213 can be first conductive described in the region overlay between the first conductive pattern 321 and the second conductive pattern 323
The side of property pattern 321 and the second conductive pattern 323.
On the other hand, as shown, the most short D3 separated by a distance between the first joint portion 211 and the second joint portion 213 can
Greater than the most short D1 separated by a distance between the first pad electrode 151 and the second pad electrode 153 and less than the first conductive pattern
321 and the second interval D 4 between conductive pattern 323.But the present invention is not limited to this, the first joint portion 211 and
It two joint portions 213 can the first pad electrode described in the region overlay between the first pad electrode 151 and the second pad electrode 153
151 and second pad electrode 153 side, therefore, most short between the first joint portion 211 and the second joint portion 213 separate away from
The most short D1 separated by a distance being smaller than from D3 between the first pad electrode 151 and the second pad electrode 153.
By keeping the interval D 4 between the first conductive pattern 321 and the second conductive pattern 323 relatively large, can be easy
Ground prevents the short circuit between first conductive pattern 321 and the second conductive pattern 323.In turn, the first engagement is being utilized
In the case that portion 211 and the second joint portion 213 carry out surface installation to light-emitting diode chip for backlight unit 100, first is being heated or hardened
During joint portion 211 and the second joint portion 213, skew can occur for the position and direction of light-emitting diode chip for backlight unit 100.However,
Such as the present embodiment, keeps the interval D 4 between the first conductive pattern 321 and the second conductive pattern 323 relatively large, make first
Joint portion 211 and the second joint portion 213 to the regional diffusion between the first conductive pattern 321 and the second conductive pattern 323,
Skew occurs for the position and direction that thus can prevent light-emitting diode chip for backlight unit 100.Moreover, reflective is filled at the first joint portion 211
The second area 140a2 of the third opening portion 140a of insulating layer 140, so it is askew more to prevent light-emitting diode chip for backlight unit 100 from occurring
Tiltedly.
Figure 43 (a) and Figure 43 (b) is to illustrate answering for the light-emitting diode chip for backlight unit 100 for applying one embodiment of the invention
The partial perspective view of articles.
The application products may be, for example, lamp paper or lamp bar (or light bar), and this application products are characterized by pliability.Herein, though
Application products are named as, but light emitting device can also be named as.
Referring to Figure 43 (a), conductive wires 2321,2323 are configured in substrate 2000, in conductive wires 2321,2323
Upper engagement light-emitting diode chip for backlight unit 100.
Substrate 2000 can be flexible film, and then can be transparent membrane.Substrate 2000 can be in long band (band) shape,
It can be in wider paper shape.
On the other hand, conductive wires 2321,2323 have relatively thin thickness, are bent to receive substrate 2000.It is conductive
Property wiring 2321,2323 can have the width for being relatively wider than light-emitting diode chip for backlight unit 100, alongside one another can arrange.
The engagement of light-emitting diode chip for backlight unit 100 is arrived at the first joint portion 211 and the second joint portion 213 illustrated before
On conductive wires 2321,2323.
As 1 to illustrated by Figure 16, light-emitting diode chip for backlight unit 100 projects light by substrate 110 referring to Fig.1.In turn, it is contacting
Electrode 130 is formed as in the case that transparent electrode and reflective insulating layer 140 have translucency, in the light that active layer 123 generates
A part can by the region between the first pad electrode 151 and the second pad electrode 153 to outside project.Pass through the first weldering
Region between pad electrode 151 and the second pad electrode 153 injects to external light can be basad again by substrate 2000
It projects 2000 lower part.
Therefore, the embodiment of the present invention application products can project light to both direction.
Herein, illustrate to be arranged with multiple light-emitting diode chip for backlight unit 100, but other illustrated before implementations can also be arranged
The light-emitting diode chip for backlight unit 200,300,400 of example.
Referring to Figure 43 (b), the application products of the present embodiment and the application products being illustrated referring to Figure 43 (a) are substantially similar, but
It is had differences in terms of being formed with wavelength conversion layer 500 on light-emitting diode chip for backlight unit 100.It is formed with wavelength conversion section 500
Light-emitting diode chip for backlight unit 100 is identical as the content being illustrated referring to Figure 38 or Figure 39, therefore detailed description will be omitted.
Wavelength conversion section 500 is formed on light-emitting diode chip for backlight unit 100, at least due to the light that projects by substrate 110
A part realizes wavelength convert.In contrast, it is projected to the region between the first pad electrode 151 and the second pad electrode 153
Light can without wavelength convert and to outside project.Therefore, it is possible to provide the application of the light of different colours is projected to both direction
Product.
Figure 44 is the skeleton diagram to illustrate the lamp bar of one embodiment of the invention.
Such as illustrated referring to Figure 43 (a) and Figure 43 (b) referring to Figure 44, the lamp bar of the present embodiment includes substrate 2000, conduction
Property wiring (omission) and 100 array of light-emitting diode chip for backlight unit.Herein, substrate 2000 is in longer shape, can be the saturating of pliability
Bright film.
Substrate 2000 has pliability, can be easily deformed by 100 lamp bar of light-emitting diode chip for backlight unit for arranging small-sized
For desired shape.Therefore, this lamp bar has the advantages that be easily positioned to relatively narrow space etc., suitable for decoration use or just
Use is taken, can be used as the indoor decoration illumination or exterior decoration illumination of automobile, can be used for showing various marks, also may be affixed to
Clothing.
In the present embodiment, it is arranged with as an example of the array of light-emitting diode chip for backlight unit 100, it is possible to use light-emitting diodes tube core
Piece 200,300,400, in turn, it is possible to use be formed with wavelength conversion section 500 light-emitting diode chip for backlight unit 100,200,300,
400。
Figure 45 is the summary section to illustrate the LED light of one embodiment of the invention.
Referring to Figure 45, the LED light includes light bulb substrate 3000, central rods 3100, LED filament 3200 and translucency light bulb
3300。
Light bulb substrate 3000 has electrode identical with light bulb substrate used in previous light bulb (light bulb)
Construction.Also, (Alternating Current, AC)/direct current (Direct can be being exchanged built in the inside of light bulb substrate 3000
Current, DC) converter etc. is passive and active member.
Light bulb substrate 3000 has electrode structure identical with previous light bulb, so the LED light of the embodiment of the present invention
Previous socket can be used, thus can save be set using LED light needed for additional facilities expense.
Central rods 3100 are configured to the center of LED light fixed to light bulb substrate 3000.Central rods 3100 may include pedestal
Portion, column portion and upper end.Central rods 3100 are supporting LED filament 3200, such as can be formed by glass.
LED filament 3200 is the lamp bar as being illustrated referring to Figure 44, including substrate, conductive wires and light emitting diode
Chip omits the explanation to the substrate, conductive wires and light-emitting diode chip for backlight unit.LED filament 3200 is by flexible lamp
Item is formed, therefore LED filament 3200 can be deformed into various shape.
The LED filament 3200 can be electrically connected to the electrode of light bulb substrate 3000 by lead (not shown).
Translucency light bulb 3300 coats LED filament 3200 and separates LED filament with external environment.Translucency light bulb 3300
It can be formed by glass or plastics.Translucency light bulb 3300 can be in various shape, can also be in shape identical with previous light bulb.
Figure 46 (a) to Figure 48 be to illustrate the perspective view of the application products of the other embodiment of the present invention (electronic device),
Top view, sectional view and circuit diagram.Figure 47 is the sectional view to illustrate the constituent parts keypad 440u in keypad 440, figure
48 be the exemplary circuit diagram of the movement for the illumination region 460 realized to the movement illustrated because of unit keypad 440u.
Referring to Figure 46 (a), electronic device 10 includes input unit 4000.For example, electronic device 10 can be such as Figure 46 (a) institute
The laptop shown, input unit 4000 can be keyboard.The electronic device 10 may include constitute basic framework shell 12,
Display 11 and input unit 4000.At this point, input unit 4000 can be formed as one with electronic device 10.On the other hand, exist
In each embodiment, input unit 4000 is also separable into monomer.As shown in Figure 46 (b), input unit 4000 can also individually structure
At electronic device.However, the electronic device 10 of the present embodiment is equivalent to an example, it, can in the case where including input unit 4000
Using light-emitting diode chip for backlight unit and/or light emitting device of the invention.E.g., including the desktop computer of input unit 4000, detection
The various electronic devices such as equipment, communication equipment may include in the present invention.
As shown in Figure 46 (a) and Figure 46 (b), input unit 4000 includes that keypad 440 and illumination region 460 may be used also in turn
Including shell 12 or 410, input structure 420, backlight 430.
Shell 12 or 410 may make up the external frame of input unit 4000, play support input structure 420, backlight 430
And the effect of keypad 440.Input structure 420, which can play reception and send, controls what keypad 440 was formed by user
The effect of various input signals.The lower section that structure 420 can be located at keypad 440 is inputted, it can be in various well known constructions.In order to
Improve the visibility of the input unit 4000 such as keyboard and/or in order to additional functional to input unit 4000, backlight 430 can be from
Lower section illuminates keypad 440.Backlight 430 may include the light-emitting diode chip for backlight unit and/or light emitting device of above-described embodiment.
The form that backlight 430 can be configured to surround keypad 440 can also be configured the lower section of keypad 440 unlike this.However,
Backlight 430 can be omitted.
In one embodiment, illumination region 460 can be located at the lower section of at least one keypad 440 in multiple keypads 440.
At this point, keypad 440 may include the light emitting region for being formed in surface, the light projected from illumination region 460 can pass through keypad 440
Light emitting region and project.Referring to Figure 47, keypad 440 is located on circuit board 411, is supported by support portion 450.At this point, circuit board
411 and support portion 450 may include input structure 420, if user to keypad 440 transmit signal (for example, passing through pressure
The input that power or touching carry out), then the signal can be inputted by support portion 450 and circuit board 411.Illumination region 460 can be located at
On circuit board 411, and it is located at the lower section of keypad 440.Can according to the input signal of keypad 440 to the connection of illumination region 460/
Disconnection is controlled.For example, as shown in figure 48, it can be according to the input signal of keypad 440 to switch SWkeyIt carries out connecing on/off
It opens, thus the resistance R of circuitkeyConnection is opened and is controlled the electric current for being applied to illumination region 460.If user is logical
It crosses and is acted as described above to the application pressure of keypad 440 and input signal, then illumination region 460 is moved with connection (on) state
Make, thus can project light by receiving the light emitting region for the keypad 440 that pressure is inputted.However, the present invention and unlimited
Due to this, it can be achieved that each embodiment.As another embodiment, illumination region 460 remains connection (on) state, if used
Person's input signal to the application pressure of keypad 440, then illumination region 460 is acted with disconnection (off) state, thus also can
It is driven in the form of the light emitting region of keypad 440 is extinguished.As another embodiment, if user applies keypad 440
Pressure and input signal are then acted in such a way that the luminosity of illumination region 460 is variable, and thus, it is possible to be carried out with receiving pressure
The changed form driving of the luminosity of the light emitting region of the keypad 440 of input.
Illumination region 460 positioned at the lower section of this keypad 440 may include the light-emitting diodes illustrated in above-described embodiment
Tube chip and/or light emitting device.With electronic equipment slimization and miniaturization, it is desirable that the thickness of input unit 4000 is very thin,
Therefore small light-emitting diode chip and/or Miniature lighting devices can be applied.In particular, by by small-sized light-emitting diodes of the invention
Tube chip and/or Miniature lighting devices are applied to the input unit such as portable keyboard, such as the electronic device of frivolous notebook
Input unit can prevent the volume of electronic device caused by the size increase because of illumination region 460 from increasing, therefore the electricity can be improved
The portability of sub-device.Also, the illumination region 460 for being located at the lower section of keypad 440 is received because of the input of keypad 440 to be continued
Stress, this stress can be transmitted to illumination region 460 light emitting device or light-emitting diode chip for backlight unit 100 and illumination region 460 occurs
It is bad.But the input unit 4000 include the excellent the present embodiment of mechanical stability light-emitting diode chip for backlight unit 100 or
Light emitting device, therefore the illumination region 460 that can prevent the lasting movement because of keypad 440 from occurring is bad.
Figure 49 is the partial top view to illustrate the keyboard of another embodiment of the present invention, and Figure 50 is the partial cutaway of Figure 49
Face figure.
Referring to Figure 49 and Figure 50, the keyboard of the present embodiment include flexible substrate 5000, conductive wires 5321,5323,
Coating 5400 and light-emitting diode chip for backlight unit 100, and may include wavelength conversion section 500.
Flexible substrate 5000 is similar to substrate 2000 illustrated before, can be transparent membrane or non-transparent film.?
Circuit layout 5320 is formed in flexible substrate 5000, and in the position of each keypad, electric conductivity pad 5300 is set.Electric conductivity pad
5300 are connected to the connector of keyboard.
Conductive wires 5321,5323 and the circuit layout 5320 are formed together in flexible substrate 5000.It is conductive
Property wiring 5321,5323 is provided to supply electric power to light-emitting diode chip for backlight unit 100.
On the other hand, coating 5400 is formed or is attached in flexible substrate 5000.Coating 5400 covers circuit and matches
Line 5320 and conductive wires 5321,5323, and using to realize that the part of electrical connection is exposed.As long as coating 5400 be with
Flexible material, then be not particularly limited, such as can be formed by silicon or epoxy resin.
Light-emitting diode chip for backlight unit 100 is configured near each electric conductivity pad 5300.Multiple light-emitting diode chip for backlight unit 100 can match
It sets around each electric conductivity pad 5300, is joined on conductive wires 5321,5323.Light-emitting diode chip for backlight unit 100 and reference
The content that Figure 11 to Figure 16 is illustrated is identical, therefore detailed description will be omitted.Also, in addition to light-emitting diode chip for backlight unit 100,
The light-emitting diode chip for backlight unit 200,300,400 of illustrated other embodiments before can be used.
On the other hand, 500 covering luminousing diode chip 100 of wavelength conversion section.Wavelength conversion section 500 is fillable to be formed in
The opening portion of coating 5400 and covering luminousing diode chip 100.Wavelength conversion section 500 can include fluorescence in transparent resin
Body particle.Thus, it can be achieved that the colour mixture light of such as white light.
In the present embodiment, illustrate for 500 covering luminousing diode chip 100 of wavelength conversion section, but can also be for by transparent
The sealing material covering luminousing diode chip 100 that resin is formed.In the case, the light generated in light-emitting diode chip for backlight unit 100
It is projected to outside, therefore the monochromatic light such as blue light or green light can be projected.
According to the present embodiment, it is possible to provide be configured with the flexible key of light-emitting diode chip for backlight unit 100 around each keypad
Disk.Flexible keyboard can be used as the input unit of portable electronic device.
In the above-described embodiments, the light-emitting diode chip for backlight unit of various embodiments of the present invention and/or light emitting device are applied
The case where input unit of electronic device, is illustrated, but the present invention is not limited to this.The light-emitting diode chip for backlight unit and/
Or light emitting device is equally applicable to require other various electronic devices of small-sized illumination region, such as be equally applicable to lighting apparatus,
Display device etc..
Claims (21)
1. a kind of light-emitting diode chip for backlight unit characterized by comprising
Substrate, the multiple protruding portion including being formed in upper surface；
Luminescent structural, be located at the substrate on, including the first conductive type semiconductor layer, be located at the first conductive type semiconductor
The second conductive type semiconductor layer on layer and it is located at the first conductive type semiconductor layer and the second conductive type semiconductor layer
Between active layer, and make the first conductive type half including penetrating through the second conductive type semiconductor layer and the active layer
At least one hole that a part of conductor layer is exposed；
Electrode is contacted, is at least partially inside on the second conductive type semiconductor layer, including partly led with the second conductive type
The transparent conductive oxide of body layer Ohmic contact；
Reflective insulating layer covers the side and upper surface of the luminescent structural, described in making to expose by the hole
The first opening portion that the first conductive type semiconductor layer exposes and the second opening portion for exposing the contact electrode locally, and wrap
Include distributed Bragg reflector；
First pad electrode is located on the reflective insulating layer, passes through first opening portion and the first conductive type
Semiconductor layer electrical connection；And
Second pad electrode is located on the reflective insulating layer, passes through second opening portion and the contact electrode electricity
Connection, and
A part of the upper surface of the substrate is exposed to the periphery of the luminescent structural, the reflective insulating layer and exposing
Connect in the upper surface of the substrate on the periphery of the luminescent structural, the top corner angle and the reflective of the substrate are exhausted
Edge layer separates.
2. light-emitting diode chip for backlight unit according to claim 1, which is characterized in that
The light-emitting diode chip for backlight unit with a thickness of 40 μm or more and 90 μm or less.
3. light-emitting diode chip for backlight unit according to claim 1, which is characterized in that
The horizontal sectional area of the light-emitting diode chip for backlight unit is 30000 μm2Above and 65000 μm2Below.
4. light-emitting diode chip for backlight unit according to claim 1, which is characterized in that
The current density of the driving current of the light-emitting diode chip for backlight unit is 7mA/mm2Above and 250mA/mm2Below.
5. light-emitting diode chip for backlight unit according to claim 1, which is characterized in that
The sum of the area of first pad electrode and second pad electrode for the light-emitting diode chip for backlight unit horizontal plane
Long-pending 80% or more and 95% or less.
6. light-emitting diode chip for backlight unit according to claim 5, which is characterized in that
First pad electrode and the most short of the second pad electrode are 3 μm to 20 μm separated by a distance.
7. light-emitting diode chip for backlight unit according to claim 1, which is characterized in that
A part in the protruding portion of the upper surface of the substrate is exposed by reflective insulating layer covering.
8. light-emitting diode chip for backlight unit according to claim 7, which is characterized in that
The residue a part exposed in the protruding portion of the upper surface of the substrate is exposed.
9. light-emitting diode chip for backlight unit according to claim 1, which is characterized in that
The contact electrode covers the upper surface of the second conductive type semiconductor layer, including making described in the luminescent structural
The third opening portion that hole is exposed and at least one the 4th opening portion for exposing the second conductive type semiconductor layer locally.
10. light-emitting diode chip for backlight unit according to claim 9, which is characterized in that
The width of 4th opening portion is less than the width of second opening portion, a part of the upper surface of the contact electrode
Connect with second pad electrode.
11. light-emitting diode chip for backlight unit according to claim 1, which is characterized in that
The substrate includes patterned sapphire substrate.
12. light-emitting diode chip for backlight unit according to claim 1, which is characterized in that
First pad electrode include to be formed its upper surface and it is corresponding with the position of first opening portion and position it is recessed
Portion,
Second pad electrode include to be formed its upper surface and it is corresponding with the position of second opening portion and position it is recessed
Portion.
13. a kind of light emitting device characterized by comprising
The second substrate；
Light-emitting diode chip for backlight unit is located in the second substrate；And
First joint portion and the second joint portion, between the light-emitting diode chip for backlight unit and the second substrate,
The light-emitting diode chip for backlight unit includes:
First substrate, the multiple protruding portion including being formed in lower surface；
Luminescent structural, positioned at the lower section of the first substrate, including the second conductive type semiconductor layer, to be located at described second conductive
The first conductive type semiconductor layer in type semiconductor layer and it is located at the first conductive type semiconductor layer and the second conductive type
Active layer between semiconductor layer, and make described first including penetrating through the second conductive type semiconductor layer and the active layer
At least one hole that a part of conductive-type semiconductor layer is exposed；
Electrode is contacted, the lower section of the second conductive type semiconductor layer is at least partially inside, is partly led with the second conductive type
Body layer Ohmic contact；
Reflective insulating layer covers the side and lower surface of the luminescent structural, described in making to expose by the hole
The first opening portion that the first conductive type semiconductor layer exposes and the second opening portion for exposing the contact electrode locally, and wrap
Include distributed Bragg reflector；
First pad electrode is led by first opening portion with described first positioned at the lower section of the reflective insulating layer
Electric type semiconductor layer electrical connection；And
Second pad electrode contacts electricity with described by second opening portion positioned at the lower section of the reflective insulating layer
Pole electrical connection, and
A part of the lower surface of the first substrate is exposed to the periphery of the luminescent structural, the reflective insulating layer with
Exposing connect in the lower surface of the first substrate on the periphery of the luminescent structural, the lower part corner angle of the first substrate with
The reflective insulating layer separates,
First joint portion and second joint portion are electrically connected respectively to first pad electrode and the second pad electrode.
14. light emitting device according to claim 13, which is characterized in that
Between first joint portion and second joint portion it is most short separated by a distance be greater than first pad electrode with it is described
Between second pad electrode it is most short separated by a distance.
15. light emitting device according to claim 13, which is characterized in that
At least one of first joint portion and second joint portion at least partially cover the reflective insulating layer,
The reflective insulating layer covers the side of the luminescent structural.
16. light emitting device according to claim 14, which is characterized in that
At least one of first joint portion and second joint portion at least partially cover exposing in the luminous structure
Make the lower surface of the first substrate on the periphery of body.
17. light emitting device according to claim 15, which is characterized in that
At least one of first joint portion and second joint portion at least partially cover the side of the first substrate
Face.
18. light emitting device according to claim 13, which is characterized in that
First joint portion and second joint portion include solder.
19. a kind of electronic device comprising input unit, which is characterized in that including according to claim 1 to any one of 12 institutes
The light-emitting diode chip for backlight unit stated and according to claim 1 any one of light emitting device described in any one of 3 to 18.
20. electronic device according to claim 19, which is characterized in that
The input unit includes multiple keypads,
The multiple keypad includes the light emitting region for being formed thereon surface, and the light projected from the light emitting region is from described
The light that light-emitting diode chip for backlight unit or the light emitting device project.
21. electronic device according to claim 19, which is characterized in that
The input unit includes multiple keypads,
The multiple keypad includes the light emitting region for being formed thereon surface, and the light-emitting diode chip for backlight unit is located at the multiple
At least part of lower section in keypad,
The light projected from the light-emitting diode chip for backlight unit or the light emitting device is projected by the light emitting region.
Applications Claiming Priority (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-2015-0144997 | 2015-10-16 | ||
| KR1020150144997A KR20170045067A (en) | 2015-10-16 | 2015-10-16 | Compact light emitting diode chip, light emitting device and electronic device including the same |
| KR1020150181128A KR101873501B1 (en) | 2015-12-17 | 2015-12-17 | Compact light emitting diode chip, light emitting device and electronic device including the same |
| KR10-2015-0181128 | 2015-12-17 | ||
| KR1020160107578A KR101894046B1 (en) | 2016-08-24 | 2016-08-24 | Compact light emitting diode chip and light emitting device including the same |
| KR10-2016-0107578 | 2016-08-24 | ||
| CN201610900247.8A CN107039569B (en) | 2015-10-16 | 2016-10-14 | Light-emitting diode chip for backlight unit |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610900247.8A Division CN107039569B (en) | 2015-10-16 | 2016-10-14 | Light-emitting diode chip for backlight unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109950377A true CN109950377A (en) | 2019-06-28 |
Family
ID=58517374
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610900247.8A Active CN107039569B (en) | 2015-10-16 | 2016-10-14 | Light-emitting diode chip for backlight unit |
| CN201910222430.0A Active CN109920899B (en) | 2015-10-16 | 2016-10-14 | Light emitting diode chip and light emitting device |
| CN201910222409.0A Active CN109904293B (en) | 2015-10-16 | 2016-10-14 | Light emitting diode chip, light emitting device and electronic device |
| CN201910222406.7A Pending CN109950377A (en) | 2015-10-16 | 2016-10-14 | Light-emitting diode chip for backlight unit, light emitting device and electronic device |
| CN201621126240.7U Expired - Fee Related CN206293462U (en) | 2015-10-16 | 2016-10-14 | Light-emitting diode chip for backlight unit |
| CN201910221951.4A Active CN109920894B (en) | 2015-10-16 | 2016-10-14 | Light emitting device |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610900247.8A Active CN107039569B (en) | 2015-10-16 | 2016-10-14 | Light-emitting diode chip for backlight unit |
| CN201910222430.0A Active CN109920899B (en) | 2015-10-16 | 2016-10-14 | Light emitting diode chip and light emitting device |
| CN201910222409.0A Active CN109904293B (en) | 2015-10-16 | 2016-10-14 | Light emitting diode chip, light emitting device and electronic device |
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| CN201621126240.7U Expired - Fee Related CN206293462U (en) | 2015-10-16 | 2016-10-14 | Light-emitting diode chip for backlight unit |
| CN201910221951.4A Active CN109920894B (en) | 2015-10-16 | 2016-10-14 | Light emitting device |
Country Status (4)
| Country | Link |
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| EP (2) | EP4235823A3 (en) |
| CN (6) | CN107039569B (en) |
| TW (3) | TWM542252U (en) |
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Also Published As
| Publication number | Publication date |
|---|---|
| TWI641166B (en) | 2018-11-11 |
| CN206293462U (en) | 2017-06-30 |
| CN107039569B (en) | 2019-04-23 |
| CN109904293B (en) | 2022-01-18 |
| EP4235823A3 (en) | 2023-10-25 |
| TWM542252U (en) | 2017-05-21 |
| CN109920899A (en) | 2019-06-21 |
| TW201715759A (en) | 2017-05-01 |
| EP3353822A1 (en) | 2018-08-01 |
| CN107039569A (en) | 2017-08-11 |
| EP3353822A4 (en) | 2019-03-20 |
| CN109920894A (en) | 2019-06-21 |
| EP3353822B1 (en) | 2023-06-07 |
| EP4235823A2 (en) | 2023-08-30 |
| CN109920899B (en) | 2021-08-06 |
| EP3353822C0 (en) | 2023-06-07 |
| TWI664753B (en) | 2019-07-01 |
| TW201810737A (en) | 2018-03-16 |
| WO2017065545A1 (en) | 2017-04-20 |
| CN109904293A (en) | 2019-06-18 |
| CN109920894B (en) | 2022-04-05 |
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